0001564590-23-004785 | 10-K | XBRL Viewer

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Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2022	Mar. 28, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Trading Symbol	WATT
Entity Registrant Name	Energous Corp
Entity Central Index Key	0001575793
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		91,032,030
Entity Public Float			$ 76,236,739
Title of 12(b) Security	Common Stock, $0.00001 par value
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Entity File Number	001-36379
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-1318953
Entity Address, Address Line One	3590 North First Street
Entity Address, Address Line Two	Suite 210
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95134
City Area Code	408
Local Phone Number	963-0200
Document Annual Report	true
Document Transition Report	false
Auditor Firm ID	688
Auditor Name	Marcum llp
Auditor Location	Melville, NY
Documents Incorporated by Reference	The registrant intends to file a definitive proxy statement pursuant to Regulation 14A within 120 days after the end of the fiscal year ended December 31, 2022. Portions of such proxy statement are incorporated by reference into Part III of this Annual Report on Form 10-K.

Balance Sheets - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 26,287,293	$ 49,071,414
Accounts receivable, net	143,353	283,602
Inventory	105,821
Prepaid expenses and other current assets	827,551	874,886
Total current assets	27,364,018	50,229,902
Property and equipment, net	429,035	510,197
Operating right-of-use lease assets	1,959,869	618,985
Other assets		11,991
Total assets	29,752,922	51,371,075
Current liabilities:
Accounts payable	900,765	1,205,957
Accrued expenses	1,790,414	1,523,317
Accrued severance	416,516	975,439
Operating lease liabilities, current portion	705,894	628,307
Deferred revenue	29,727	13,364
Total current liabilities	3,843,316	4,346,384
Long-term liabilities:
Operating lease liabilities, long-term portion	1,264,131	40,413
Total liabilities	5,107,447	4,386,797
Commitments and contingencies
Stockholders’ equity:
Preferred Stock, $0.00001 par value, 10,000,000 shares authorized at December 31, 2022 and December 31, 2021; no shares issued or outstanding
Common Stock, $0.00001 par value, 200,000,000 shares authorized at December 31, 2022 and December 31, 2021; 78,944,954 and 76,667,205 shares issued and outstanding at December 31, 2022 and December 31, 2021, respectively.	789	767
Additional paid-in capital	387,319,985	383,383,550
Accumulated deficit	(362,675,299)	(336,400,039)
Total stockholders’ equity	24,645,475	46,984,278
Total liabilities and stockholders’ equity	$ 29,752,922	$ 51,371,075

Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2022	Dec. 31, 2021
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.00001	$ 0.00001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.00001	$ 0.00001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	78,944,954	76,667,205
Common stock, shares outstanding	78,944,954	76,667,205

Statements of Operations - USD ($)	12 Months Ended
Statements of Operations - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue	$ 851,321	$ 756,793
Operating expenses:
Cost of revenue	1,277,565
Research and development	12,497,781	20,572,580
Sales and marketing	4,884,959	8,598,343
General and administrative	8,078,950	9,001,483
Severance expense	798,391	4,017,172
Total operating expenses	27,537,646	42,189,578
Loss from operations	(26,686,325)	(41,432,785)
Other income:
Interest income	411,065	5,492
Total other income	411,065	5,492
Net loss	$ (26,275,260)	$ (41,427,293)
Basic loss per common share	$ (0.34)	$ (0.64)
Weighted average shares outstanding, basic	77,485,729	64,926,524
Diluted loss per common share	$ (0.34)	$ (0.64)
Weighted average shares outstanding, diluted	77,485,729	64,926,524

Statement of Changes in Stockholder's Equity - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2020	$ 49,052,506	$ 614	$ 344,024,638	$ (294,972,746)
Beginning balance (in shares) at Dec. 31, 2020		61,292,412
Stock-based compensation - stock options	284,994		284,994
Stock-based compensation - restricted stock units ("RSUs")	5,561,698		5,561,698
Stock-based compensation - employee stock purchase plan ("ESPP")	252,568		252,568
Stock-based compensation - performance share units ("PSUs")	5,831,928		5,831,928
Issuance of shares for RSUs		$ 14	(14)
Issuance of shares for RSUs (in shares)		1,431,532
Issance of shares for PSUs		$ 14	(14)
Issuance of shares for PSUs (in shares)		1,420,938
Shares purchased from contributions to the ESPP	384,126	$ 3	384,123
Shares purchased from contributions to the ESPP (in shares)		292,890
Issuance of shares in an at-the-market ("ATM") placement, net of issuance costs	27,043,751	$ 122	27,043,629
Issuance of shares in an at-the-market ("ATM") placement, net of issuance costs (in shares)		12,229,433
Net loss	(41,427,293)			(41,427,293)
Ending balance at Dec. 31, 2021	46,984,278	$ 767	383,383,550	(336,400,039)
Ending balance (in shares) at Dec. 31, 2021		76,667,205
Stock-based compensation - stock options	74,771		74,771
Stock-based compensation - restricted stock units ("RSUs")	2,581,726		2,581,726
Stock-based compensation - employee stock purchase plan ("ESPP")	124,053		124,053
Stock-based compensation - performance share units ("PSUs")	138,287		138,287
Issuance of shares for RSUs		$ 10	(10)
Issuance of shares for RSUs (in shares)		1,022,920
Issance of shares for PSUs		$ 1	(1)
Issuance of shares for PSUs (in shares)		135,575
Shares purchased from contributions to the ESPP	272,833	$ 3	272,830
Shares purchased from contributions to the ESPP (in shares)		345,929
Issuance of shares in an at-the-market ("ATM") placement, net of issuance costs	744,787	$ 8	744,779
Issuance of shares in an at-the-market ("ATM") placement, net of issuance costs (in shares)		773,325
Net loss	(26,275,260)			(26,275,260)
Ending balance at Dec. 31, 2022	$ 24,645,475	$ 789	$ 387,319,985	$ (362,675,299)
Ending balance (in shares) at Dec. 31, 2022		78,944,954

Statement of Changes in Stockholder's Equity (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
ATM [Member]
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	$ 73,403	$ 868,122

Statements of Cash Flows - USD ($)	12 Months Ended
Statements of Cash Flows - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net loss	$ (26,275,260)	$ (41,427,293)
Adjustments to reconcile net loss to Net cash used in operating activities:
Depreciation and amortization	246,156	258,249
Stock based compensation	2,918,837	11,931,188
Change in operating lease right-of-use assets	730,452	674,306
Bad debt expense	40,737	10,850
Changes in operating assets and liabilities:
Accounts receivable	99,512	(218,602)
Inventory	(105,821)
Prepaid expenses and other current assets	47,335	(238,184)
Other assets	11,991	(10,381)
Accounts payable	(305,192)	109,118
Accrued expenses	267,097	(52,970)
Accrued severance	(558,923)	975,439
Operating lease liabilities	(770,031)	(733,473)
Deferred revenue	16,363	1,364
Net cash used in operating activities	(23,636,747)	(28,720,389)
Cash flows from investing activities:
Purchases of property and equipment	(164,994)	(365,735)
Net cash used in investing activities	(164,994)	(365,735)
Cash flows from financing activities:
Net proceeds from an at-the-market ("ATM") offerings	744,787	27,043,751
Proceeds from contributions to employee stock purchase plan	272,833	384,126
Net cash provided by financing activities	1,017,620	27,427,877
Net decrease in cash and cash equivalents	(22,784,121)	(1,658,247)
Cash and cash equivalents - beginning	49,071,414	50,729,661
Cash and cash equivalents - ending	26,287,293	49,071,414
Supplemental disclosure of non-cash financing activities:
Increase in operating lease right-of-use assets and operating lease liabilities	2,071,336
Performance Share Unit (PSUs) [Member]
Supplemental disclosure of non-cash financing activities:
Common stock issued	1	14
Restricted Stock Units (RSUs) [Member]
Supplemental disclosure of non-cash financing activities:
Common stock issued	$ 10	$ 14

Business Organization, Nature of Operations

12 Months Ended

Dec. 31, 2022

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Business Organization, Nature of Operations

Note 1 – Business Organization, Nature of Operations

Energous Corporation (the “Company”) was incorporated in Delaware on October 30, 2012. The Company has developed its WattUp® wireless power technology, consisting of proprietary semiconductor chipsets, software controls, hardware designs and antennas, that enables radio frequency (“RF”) based charging for electronic devices. The WattUp technology has a broad spectrum of capabilities, including near-field wireless charging and at-a-distance wireless charging at various distances. The Company believes its proprietary WattUp technologies are well suited for many applications, including building and home automation, electronic shelf labels, industrial IoT sensors, surface and implanted medical devices, tracking devices, hearables, wearables, consumer electronics and public safety applications. Potential future applications include smartphones, commercial and industrial robotics, as well as automotive solutions and other devices with charging requirements that would otherwise require battery replacement or a wired power connection.

Liquidity and Management Plans

12 Months Ended

Dec. 31, 2022

Liquidity And Management Plan Disclosure [Abstract]

Liquidity and Management Plans

Note 2 – Liquidity and Management Plans

During the years ended December 31, 2022 and 2021, the Company has recorded revenue of $851,321 and $756,793, respectively. The Company incurred a net loss of $26,275,260 and $41,427,293 for the years ended December 31, 2022 and 2021, respectively. Net cash used in operating activities was $23,636,747 and $28,720,389 for the years ended December 31, 2022 and 2021, respectively. The Company is currently meeting its liquidity requirements through the proceeds of securities offerings that raised net proceeds of $27,043,751 during 2021 and $744,787 during 2022, proceeds from contributions to the employee stock purchase plan (“ESPP”), along with payments received from customers.

As of December 31, 2022, the Company had cash on hand of $26,287,293. The Company expects that cash on hand as of December 31, 2022, together with proceeds from the underwritten offering conducted during the first quarter of 2023 (See Note 12 – Subsequent Events) and anticipated revenues, will be sufficient to fund the Company’s operations into March 2024.

Research and development of new technologies is by its nature unpredictable. Although the Company intends to continue its research and development activities, there can be no assurance that its available resources and revenue generated from its business operations will be sufficient to sustain its operations. Accordingly, the Company expects to pursue additional financing, which could include offerings of equity or debt securities, bank financings, commercial agreements with customers or strategic partners, and other alternatives, depending upon market conditions. There is no assurance that such financing would be available on terms that the Company would find acceptable, or at all.

The market for products using the Company’s technology is broad and evolving, but remains nascent and unproven, so the Company’s success is dependent upon many factors, including customer acceptance of its existing products, technical feasibility of future products, regulatory approvals, the development of complementary technologies, competition and global market fluctuations.

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Note 3 – Summary of Significant Accounting Policies

Basis of Presentation

The accompanying financial statements are presented in U.S. dollars and have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”), and pursuant to the accounting and disclosure rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”).

Note 3 – Summary of Significant Accounting Policies, continued

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities at the date of the financial statements as well as the reported expenses during the reporting periods.

The Company’s significant estimates and assumptions include the valuation of stock-based compensation awards, recognition of revenue, the lower of cost or net realizable value of inventory and valuation of deferred tax assets. Some of these judgments can be subjective and complex, and, consequently, actual results may differ from these estimates. Although the Company believes that its estimates and assumptions are reasonable, they are based upon information available at the time the estimates and assumptions were made. Actual results could differ from those estimates.

Cash and Cash Equivalents

The Company considers all short-term, highly liquid investments with an original maturity at the date of purchase of three months or less to be cash equivalents. The Company maintains cash balances that may be uninsured or in deposit accounts that exceed Federal Deposit Insurance Corporation limits. The Company maintains its cash deposits with major financial institutions.

Revenue Recognition

The Company follows Accounting Standards Codification (“ASC”) Topic 606, "Revenue from Contracts with Customers” (“Topic 606”).

In accordance with Topic 606, the Company recognizes revenue using the following five-step approach:

Identify the contract with the customer.

Identify the performance obligations in the contract.

Determine the transaction price of the contract.

Allocate the transaction price to the performance obligations of the contract.

Recognize revenue when the performance obligations are met or delivered.

The Company’s revenue consists of its single segment of wireless charging system solutions. The wireless charging system revenue consists of revenue from product development projects and production-level systems. During the years ended December 31, 2022 and 2021, the Company recognized $851,321 and $756,793 in revenue, respectively.

The Company records revenue associated with product development projects that it enters into with certain customers. In general, these product development projects are complex, and the Company does not have certainty about its ability to achieve the project milestones. The achievement of a milestone is dependent on the Company’s performance obligation and requires acceptance by the customer. The Company recognizes this revenue at the point in time at which the performance obligation is met. The payment associated with achieving the performance obligation is generally commensurate with the Company’s effort or the value of the deliverable and is nonrefundable. The Company records the expenses related to these product development projects in research and development expense, in the periods such expenses were incurred.

Revenue Recognition

The Company records revenue associated with the sale of production-level systems at the point in time at which control over the product is transferred to the customer. The Company records the expense related to the sales of these systems as cost of revenue during the period that the product is transferred to the customer.

Note 3 – Summary of Significant Accounting Policies, continued

Inventory

The Company follows ASC Topic 330, Inventory (“Topic 330”) to account for its inventory, which includes finished goods ready for sale, work in process and raw materials, at the lower of cost or net realizable value. Net realizable value is calculated at the end of each reporting period and adjustment, if needed, is made.

Research and Development

Research and development expenses are charged to operations as incurred. For internally developed patents, all patent application costs are expensed as incurred as research and development expense. Patent application costs, which are generally legal costs, are expensed as research and development costs until such time as the future economic benefits of such patents become more certain. The Company incurred research and development costs of $12,497,781 and $20,572,580 for the years ended December 31, 2022 and 2021, respectively.

Stock-Based Compensation

The Company accounts for equity instruments issued to employees in accordance with accounting guidance that requires awards to be recorded at their fair value on the date of grant and are amortized over the vesting period of the award. The Company recognizes compensation costs on a straight-line basis over the requisite service period of the award, which is typically the vesting term of the equity instrument issued.

Under the Company’s Employee Stock Purchase Plan (“ESPP”), employees may purchase a limited number of shares of the Company’s stock at a 15% discount from the lower of the closing market prices measured on the first and last days of each half-year period. The Company recognizes stock-based compensation expense for the fair value of the purchase options, as measured on the grant date.

Income Taxes

Tax benefits are recognized only for tax positions that are more likely than not to be sustained upon examination by tax authorities. The amount recognized is measured as the largest amount of benefit that is greater than 50 percent likely to be realized upon settlement. A liability for “unrecognized tax benefits” is recorded for any tax benefits claimed in the Company’s tax returns that do not meet these recognition and measurement standards. As of December 31, 2022, no liability for unrecognized tax benefits was required to be reported. The guidance also discusses the classification of related interest and penalties on income taxes. The Company’s policy is to record interest and penalties on uncertain tax positions as a component of income tax expense. No interest or penalties were recorded during the years ended December 31, 2022 and 2021. The Company files income tax returns with the United States and California governments.

Net Loss Per Common Share

Basic net loss per share is computed by dividing net loss available to common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per share is computed using the weighted average number of common shares and, if dilutive, potential common shares outstanding during the period. Potential common shares consist of the incremental common shares issuable upon the exercise of stock options and warrants (using the treasury stock method), the vesting of restricted stock units (“RSUs”) and performance stock units (“PSUs”) and the enrollment of employees in the ESPP. The computation of diluted loss per share excludes potentially dilutive securities of 4,132,060 and 5,519,068 for the years ended December 31, 2022 and 2021, respectively, because their inclusion would be antidilutive.

Note 3 – Summary of Significant Accounting Policies, continued

Net Loss Per Common Share, continued

Potentially dilutive securities outlined in the table below have been excluded from the computation of diluted net loss per share because the effect of their inclusion would have been anti-dilutive.

	For the Years Ended December 31,
	2022		2021
Warrants issued to private investors		1,666,666		3,284,789
Options to purchase common stock		300,262		525,006
RSUs		2,165,132		1,709,273
Total potentially dilutive securities		4,132,060		5,519,068

The table above includes 1,666,666 warrants expiring March 1, 2024, with an exercise price of $10.00. During the year ended December 31, 2022, 1,618,123 warrants with an exercise price of $23.00 expired.

Leases

The Company determines if an arrangement is a lease at the inception of the arrangement. The Company applies the short-term lease recognition exemption and recognizes lease payments in profit or loss at lease commencement for facility or equipment leases that have a lease term of 12 months or less and do not include a purchase option whose exercise is reasonably certain. Operating leases are included in operating lease right-of-use (“ROU”) assets and operating lease liabilities.

ROU assets represent the right to use an underlying asset for the lease term, and lease liabilities represent the obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are measured and recorded at the service commencement date based on the present value of lease payments over the lease term. The Company uses the implicit interest rate when readily determinable; however, most leases do not establish an implicit rate, so the Company uses an estimate of the incremental borrowing rate based on the information available at the time of measurement. Lease expense for lease payments is recognized on a straight-line basis over the lease term. See Note 6 – Commitments and Contingencies, Operating Leases for further discussion of the Company’s operating leases.

Management’s Evaluation of Subsequent Events

The Company evaluates events that have occurred after the balance sheet date of December 31, 2022, through the date which the financial statements are issued.

Property and Equipment

12 Months Ended

Dec. 31, 2022

Property Plant And Equipment [Abstract]

Property and Equipment

Note 4 – Property and Equipment

Property and equipment are as follows:

	As of December 31,
	2022			2021
Computer software	$	978,147		$	916,498
Computer hardware		2,144,364			2,211,490
Furniture and fixtures		488,465			484,186
Leasehold improvements		782,538			782,538
		4,393,514			4,394,712
Less – accumulated depreciation		(3,964,479	)		(3,884,515	)
Total property and equipment, net	$	429,035		$	510,197

The Company currently uses the following expected life terms for depreciating property and equipment: computer software – 1-2 years, computer hardware – 3 years, furniture and fixtures – 7 years, leasehold improvements – remaining life of the lease.

Note 4 – Property and Equipment, continued

The Company disposed of $166,192 and $130,341 in property and equipment during the years ended December 31, 2022 and 2021, respectively. Total depreciation and amortization expense of the Company’s property and equipment was $246,156 and $258,249 for the years ended December 31, 2022 and 2021, respectively.

Accrued Expenses

12 Months Ended

Dec. 31, 2022

Payables And Accruals [Abstract]

Accrued Expenses

Note 5 – Accrued Expenses

Accrued expenses consist of the following:

	As of December 31,
	2022		2021
Accrued compensation	$	1,306,503	$	1,217,176
Accrued legal expenses		298,546		178,236
Other accrued expenses		185,365		127,905
Total	$	1,790,414	$	1,523,317

Commitments and Contingencies

12 Months Ended

Dec. 31, 2022

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

Note 6 – Commitments and Contingencies

Operating Leases

San Jose Lease

On May 20, 2022, the Company signed a lease amendment to the existing lease of its office space at its corporate headquarters in San Jose, California, extending the term of the lease for an additional three years. Upon signing the lease amendment, the Company recorded a new ROU lease asset of $2,071,336 and operating lease liability of $2,071,336, using a present value discount rate of 3.0%. Upon expiration of the original lease on September 30, 2022, the new monthly lease payment starting October 1, 2022 was $58,903, subject to annual escalations up to a maximum monthly lease payment of $62,490.

Costa Mesa Lease

On July 15, 2019, the Company signed a new lease agreement for the lease of office space in Costa Mesa, California for an additional two years. Upon expiration of the original lease on September 30, 2019, the new monthly lease payment starting October 1, 2019 was $9,773, subject to an annual escalation up to a maximum monthly lease payment of $10,200.

On September 22, 2021, the Company signed a new Costa Mesa lease to lease a new, distinct office space in a different building with the same landlord. Per the lease, the stated commencement date was October 1, 2021 with the lease running through September 30, 2023, and the Company did not take control of the new office space until October 2021, at which time the Company recorded a new right-of-use asset of $104,563 and operating lease liability of $104,563. The new Costa Mesa lease had an initial monthly lease payment of $4,369 which started on October 1, 2021, subject to an annual escalation up to a maximum monthly lease payment of $4,522.

Operating Lease Commitments

The Company follows ASC 842, Leases, (“Topic 842”) and recognizes the required ROU assets and operating lease liabilities on its balance sheet. The Company anticipates having future total lease payments of $2,048,733 during the period from the first quarter of 2023 to the third quarter of 2025. As of December 31, 2022, the Company has total operating lease right-of-use assets of $1,959,869, current portion operating lease liabilities of $705,894 and long-term portion of operating lease liabilities of $1,264,131. The weighted average remaining lease term is 2.7 years as of December 31, 2022.

Note 6 – Commitments and Contingencies, continued

Operating Leases, continued

Operating Lease Commitments, continued

The future minimum lease payments for leased locations are as follows:

For the Year Ended December 31,	Amount
2023	$	752,828
2024		733,497
2025		562,408
Total future lease payments		2,048,733
Present value discount (2.9% weighted average)		(78,708	)
Total operating lease liabilities	$	1,970,025

Hosted Design Solution Agreement

In June 2021, the Company entered into an electronic design automation software in a hosted environment license agreement with a term of three years under which the Company is required to remit quarterly payments of approximately $233,000 through the second quarter of 2024.

Litigations, Claims, and Assessments

The Company is from time to time involved in various disputes, claims, liens and litigation matters arising in the normal course of business. While the outcome of these disputes, claims, liens and litigation matters cannot be predicted with certainty, after consulting with legal counsel, management does not believe that the outcome of these matters will have a material adverse effect on the Company's combined financial position, results of operations or cash flows.

MBO Bonus Plan

On March 15, 2018, the Company’s Board of Directors (“Board”), on the recommendation of the Board’s Compensation Committee (“Compensation Committee”), approved the Energous Corporation MBO Bonus Plan (“Bonus Plan”) for executive officers of the Company. To be eligible to receive a bonus under the Bonus Plan, an executive officer must be continuously employed throughout the applicable performance period, in good standing, and achieve the performance objectives selected by the Compensation Committee.

Under the Bonus Plan, the Compensation Committee is responsible for selecting the amounts of potential bonuses for executive officers, the performance metrics used to determine whether any such bonuses will be paid and determining whether those performance metrics have been achieved.

During the years ended December 31, 2022 and 2021, the Company recognized a total of $1,293,875 and $1,433,990, respectively, in expense under the Bonus Plan. As of December 31, 2022, $688,364 of the 2022 amount was not yet paid and is included in accrued expenses. The expense under the Bonus Plan is recorded under operating expenses on the Company’s Statement of Operations within each executive’s department.

Severance and Change in Control Agreement

On March 15, 2018, the Compensation Committee approved a form of Severance and Change in Control Agreement (“Severance Agreement”) that the Company may enter into with executive officers (each, an “Executive”).

Note 6 – Commitments and Contingencies, continued

Severance and Change in Control Agreement, continued

Under the Severance Agreement, if an Executive is terminated in a qualifying termination, the Company agrees to pay the Executive six to 12 months of that Executive’s monthly base salary. If Executive elects continued coverage under the Consolidated Omnibus Budget Reconciliation Act of 1985, as amended (“COBRA”) the Company will pay the full amount of Executive’s premiums under the Company’s health, dental and vision plans, including coverage for the Executive’s eligible dependents, for the six to 12 month period following the Executive’s termination.

Executive Employee Agreement – Cesar Johnston

On December 9, 2021, the Company announced that Cesar Johnston had been appointed as the Company’s Chief Executive Officer. In connection with Mr. Johnston’s appointment as Chief Executive Officer, the Company and Mr. Johnston executed an offer letter dated as of December 6, 2021.

Under the offer letter, Mr. Johnston will receive an annual base salary of $400,000 per year. Beginning in year 2022, he is eligible to receive a discretionary annual bonus of up to 100% of his base salary, at the recommendation of the Company’s Compensation Committee, with the approval of the Company’s Board of Directors. In addition, as an inducement to accept his appointment as Chief Executive Officer, Mr. Johnston received, subject to continued employment, (a) a special one-time sign-on bonus in the amount of $120,000, payable in two equal installments of $60,000 each on the first payroll date in 2022 and the first payroll date after December 6, 2022, (b) a grant of 150,000 restricted stock units to acquire shares of the Company’s common stock, one third of which vested on December 6, 2022 and the remaining two thirds of which will vest in eight equal installments of 12,500 each on each quarterly anniversary thereafter and (c) a grant of an option to purchase 300,000 shares of the Company’s common stock at an exercise price equal to the fair market value of the Company’s common stock on the grant date, half of which shall vest on December 31, 2023, a quarter of which shall vest on December 31, 2024 and the remainder of which shall vest on December 31, 2025.

Also pursuant to the terms of his offer letter, Mr. Johnston is eligible for (a) an additional equity award in the amount of 287,000 PSUs to acquire shares of the Company’s common stock, to vest at various amounts to be agreed upon by the Board per year over a three year period commencing January 1, 2022 and ending December 31, 2024, upon the achievement of performance criteria to be mutually established by Mr. Johnston and the Compensation Committee, and (b) an additional equity award of up to 25,000 PSUs per calendar year for each of 2022, 2023 and 2024, based on outperformance of agreed upon goals per calendar year, as determined by the Compensation Committee with approval of the Board. On July 20, 2022, the Board approved, by unanimous written consent, the grant to Mr. Johnston of up to 287,000 PSUs pursuant to the terms of Mr. Johnston’s offer letter. The 287,000 PSUs that have been approved shall vest as follows: (a) up to 187,000 PSU shares shall vest on December 31, 2022, subject to Mr. Johnston’s continued service as Chief Executive Officer and the achievement, to be determined in the Compensation Committee’s sole discretion, by Mr. Johnston of certain performance metrics previously determined by the Compensation Committee and approved by the Board, and (b) up to an additional 50,000 PSU shares shall vest on each of December 31, 2023 and December 31, 2024, subject to Mr. Johnston’s continued service as Chief Executive Officer and the achievement, to be determined in the Compensation Committee’s sole discretion, by Mr. Johnston of certain performance metrics to be recommended by the Compensation Committee and approved by the Board at a subsequent date. As of December 31, 2022, the Company accrued $360,000 in bonus expense for Mr. Johnston’s annual discretionary bonus and recorded $120,000 in bonus expense for Mr. Johnston’s one-time sign-on bonus. As of December 31, 2022, only 187,000 PSUs have approved performance criteria. As of December 31, 2022, 135,575 PSU shares were earned and deemed delivered on that date. As of December 31, 2022, the Board has not approved any additional equity awards based on outperformance of agreed upon goals. As of December 31, 2022, the Board has not approved the goals for the additional 50,000 PSU shares for vesting on each of December 31, 2023 and 2024; therefore, these PSUs have not been considered granted.

Note 6 – Commitments and Contingencies, continued

Executive Employee Agreement – Cesar Johnston, continued

In connection with Mr. Johnston’s appointment as Chief Executive Officer, the Company and Mr. Johnston additionally entered into an amended and restated severance and change in control agreement, dated as of December 6, 2021. In the event of a termination that is not a change-in-control qualifying termination, Mr. Johnston is entitled to (a) a one-time lump sum payment by the Company in an amount equal to 18 months of his monthly base salary plus an amount equal to 100% of his target bonus plus, if agreed by the Compensation Committee, a discretionary bonus for the year in which the termination occurs, (b) any outstanding unvested equity awards held by Mr. Johnston that would vest in the next 18 months of continuing employment (other than any equity awards that vest upon satisfaction of performance criteria) will accelerate and become vested and (c) if Mr. Johnston timely elects continued coverage under the Consolidated Omnibus Budget Reconciliation Act of 1985, as amended (“COBRA”), the Company or its successor will pay the full amount of Mr. Johnston’s COBRA premiums on his behalf for 18 months.

Mr. Johnston’s agreement additionally provides that, in the event of a change-in-control qualifying termination, Mr. Johnston is entitled to (a) a one-time lump sum payment by the Company in an amount equal to 18 months of his monthly base salary plus an amount equal to 150% of his target bonus plus a prorated bonus for the year in which the termination occurs, (b) any outstanding unvested equity awards held by Mr. Johnston (including any equity awards that vest upon satisfaction of performance criteria) will accelerate in full and become vested and (c) if Mr. Johnston timely elects continued coverage under COBRA, the Company or its successor will pay the full amount of Mr. Johnston’s COBRA premiums on his behalf for 18 months.

Mr. Johnston is also eligible to receive all customary and usual benefits generally available to senior executives of the Company.

Executive Transition Agreement – Stephen Rizzone

On April 3, 2015, the Company entered into an Amended and Restated Executive Employment Agreement with Stephen R. Rizzone, the Company’s President and Chief Executive Officer (“Employment Agreement”).

The Employment Agreement effective as of January 1, 2015, has an initial term of four years and automatically renews each year after the initial term. The Employment Agreement provides for an annual base salary of $365,000, and Mr. Rizzone is eligible to receive quarterly cash bonuses from the MBO Bonus Plan with a total target amount equal to 100% of his base salary based upon achievement of performance-based objectives established by the Board.

On July 9, 2021, the Company announced that Stephen R. Rizzone has retired from his position as the Company’s President and Chief Executive Officer and as a member of the Board.

In connection with Mr. Rizzone’s retirement, the Company and Mr. Rizzone entered into an Executive Transition Agreement (“Separation Agreement”), providing for continued employment through August 31, 2021. Upon his termination of employment, the Separation Agreement provides severance payments and benefits to Mr. Rizzone consistent with the terms of his existing employment agreement with the Company, including without limitation: compensation-based payments of $1,460,000 in the aggregate, payable under a certain payment scheme as set forth therein, an additional lump sum cash payment of $2,000,000, a pro-rated bonus payment for the two months of employment during the current quarterly bonus period payable at the same time bonus payments are made to other executives of the Company, settlement of deferred vested restricted stock units and an extension of the exercise periods of all stock options held by Mr. Rizzone until the one year anniversary of his termination date, and additional benefits related to Mr. Rizzone’s medical insurance. In addition, the Company will pay-off all amounts owed under a lease agreement relating to a Company Car and Mr. Rizzone will receive the title to the vehicle. All compensation under the Separation Agreement will be subject to applicable withholding.

During the year ended December 31, 2021, the Company recorded $4,017,172 in severance expense associated with the separation agreement, including $284,994 in additional stock-based compensation as a result of the extension of the exercise periods on the stock options. As of December 31, 2022, the Company had unpaid accrued severance expense of $411,607 which is expected to be paid by August 2023.

Note 6 – Commitments and Contingencies, continued

Executive Transition Agreement – Neeraj Sahejpal

On April 29, 2022, the Company announced the departure of Neeraj Sahejpal, former Senior Vice President of Marketing and Business Development, effective April 30, 2022. Pursuant to the terms of Mr. Sahejpal’s severance and change of control agreement with the Company, Mr. Sahejpal received payments and benefits including compensation equal to 12 months of Mr. Sahejpal’s then-current salary of $261,250, 12 months of maximum potential bonus of $261,250, and 12 months of COBRA reimbursements. In addition, all RSUs held by Mr. Sahejpal that were due to vest in the 12 months after his departure, totaling RSUs covering 85,943 shares, were accelerated.

The Company recorded $798,391 in total severance expense pertaining to Mr. Sahejpal’s departure for the year ended December 31, 2022, including $252,609 in stock-based compensation as a result of accelerated vesting of RSUs. As of December 31, 2022, the Company had unpaid accrued severance expense of $4,909 pertaining to Mr. Sahejpal’s agreement which is expected to be paid through April 30, 2023.

Strategic Alliance Agreement

In November 2016, the Company and Dialog Semiconductor plc (“Dialog”), a related party (see Note 10—Related Party Transactions), entered into a Strategic Alliance Agreement (“Alliance Agreement”) for the manufacture, distribution and commercialization of products incorporating the Company’s wire-free charging technology (“Licensed Products”). Pursuant to the terms of the Alliance Agreement, the Company agreed to engage Dialog as the exclusive supplier of the Licensed Products for specified fields of use, subject to certain exceptions (the “Company Exclusivity Requirement”). Dialog agreed to not distribute, sell or work with any third party to develop any competing products without the Company’s approval (the “Dialog Exclusivity Requirement”). In addition, both parties agreed on a revenue sharing arrangement and will collaborate on the commercialization of Licensed Products based on a mutually-agreed upon plan. Each party will retain all of its intellectual property.

The Alliance Agreement has an initial term of seven years, with automatic renewal annually thereafter unless terminated by either party upon 180 days’ prior written notice. Under the terms of the Alliance Agreement, the Company could terminate the Alliance Agreement at any time after the third anniversary of the Agreement upon 180 days’ prior written notice to Dialog, or if Dialog breaches certain exclusivity obligations. Dialog could terminate the Alliance Agreement if sales of Licensed Products did not meet specified targets. The Company Exclusivity Requirement had a termination date of the earlier of January 1, 2021 or the occurrence of certain events relating to the Company’s pre-existing exclusivity obligations. The Company Exclusivity Requirement renewed automatically on an annual basis unless the Company and Dialog agree to terminate the requirement.

On September 20, 2021, the Company was notified by Dialog, then recently acquired by Renesas Electronics Corporation, that it was terminating the Alliance Agreement. There is a wind down period included in the Alliance Agreement which will conclude in September 2024. During the wind down period, the Alliance Agreement’s terms will continue to apply to the Company’s products that are covered by certain existing customer relationships, except that the parties’ respective exclusivity rights have terminated.

Stockholders' Equity

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Stockholders' Equity

Note 7 – Stockholders’ Equity

Authorized Capital

The holders of the Company’s common stock are entitled to one vote per share. Holders of common stock are entitled to receive ratably such dividends, if any, as may be declared by the board of directors out of legally available funds. Upon the liquidation, dissolution or winding up of the Company, holders of common stock are entitled to share ratably in all assets of the Company that are legally available for distribution.

Financing

On September 15, 2020, the Company filed a shelf registration statement on Form S-3 with the SEC, which became effective on September 24, 2020, and contains two prospectuses: a base prospectus, which covers the offering, issuance and sale by the Company of up to $75,000,000 of its common stock, preferred stock, debt securities, warrants to purchase our common stock, preferred stock or debt securities, subscription rights to purchase its common stock, preferred stock or debt securities and/or units consisting of some or all of these securities; and an at-the-market sales agreement prospectus supplement covering the offering, issuance and sale by the Company of up to a maximum aggregate offering price of $40,000,000 of its common stock that may be issued and sold under the At Market Issuance Sales Agreement, as amended, between the Company, B. Riley Securities, Inc., Roth Capital Partners LLC and Ladenburg Thalmann & Co. Inc. (the “ATM Program”). The $40,000,000 of common stock to be offered, issued and sold under the ATM Program is included in the $75,000,000 of securities that may be offered, issued and sold by the Company under the base prospectus. Pursuant to this shelf registration statement, the Company sold shares which raised net proceeds of $38,832,711 (net of $1,167,289 in issuance costs) during the third and fourth quarters of 2020 under the ATM Program.

On October 4, 2021, the Company filed a prospectus supplement covering the offering, issuance and sale of up to an additional $35,000,000 of shares of the Company’s common stock pursuant to the ATM Program. The Company raised net proceeds of $27,043,751 (net of $868,122 in issuance costs), during 2021 under the ATM Program. During 2022, the Company raised an additional $744,787 (net of $73,403 in issuance costs). As of December 31, 2022, the Company has $6,269,937 of common stock registered for sale under the ATM Program.

On November 15, 2021, the Company filed a shelf registration statement on Form S-3 with the SEC, which became effective on December 16, 2021. This shelf registration statement allows the Company to sell, from time to time, any combination of debt or equity securities described in the registration statement up to aggregate proceeds of $100,000,000.

Common Stock Outstanding

Our outstanding shares of common stock typically include shares that are deemed delivered under U.S. GAAP. Shares that are deemed delivered currently include shares that have vested, but have not yet been delivered, under tax-deferred equity awards, as well as shares purchased under the ESPP where actual transfer of shares normally occurs a few days after the completion of the purchase periods. There are no voting rights for shares that are deemed delivered under U.S. GAAP until the actual delivery of shares takes place. There are currently 200,000,000 shares of common stock authorized for issuance.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

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+ Details

Stock Based Compensation

12 Months Ended

Dec. 31, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Based Compensation

Note 8 – Stock Based Compensation

Equity Incentive Plans

2013 Equity Incentive Plan

Effective on June 16, 2021, the Company’s stockholders approved the amendment and restatement of the 2013 Equity Incentive Plan to increase the number of shares reserved for issuance thereunder by 1,500,000 shares, bringing to 8,785,967 the total number of shares approved for issuance under that plan.

As of December 31, 2022, 1,294,884 shares of common stock remain eligible to be issued through equity-based instruments under the 2013 Equity Incentive Plan.

2014 Non-Employee Equity Compensation Plan

Effective on May 26, 2020, the Company’s stockholders approved the amendment and restatement of the 2014 Non-Employee Equity Compensation Plan to increase the number of shares reserved for issuance through equity-based instruments thereunder by 800,000 shares, bringing to 1,650,000 the total number of shares approved for issuance under that plan.

As of December 31, 2022, 670,690 shares of common stock remain eligible to be issued through equity-based instruments under the 2014 Non-Employee Equity Compensation Plan.

2015 Performance Share Unit Plan

Effective on June 16, 2021, the Company’s stockholders approved the amendment and restatement of the 2015 Performance Share Unit Plan to increase the number of shares reserved for issuance through equity-based instruments thereunder by 1,700,000 shares, bringing to 5,110,104 the total number of shares approved for issuance under that plan.

As of December 31, 2022, 2,275,438 shares of common stock remain eligible to be issued through equity-based instruments under the 2015 Performance Share Unit Plan.

2017 Equity Inducement Plan

On December 28, 2017, the Board approved the 2017 Equity Inducement Plan (“2017 Plan”). Under the 2017 Plan, the Board reserved 600,000 shares for the grant of RSUs. These grants will be administered by the Board or a committee of the Board. These awards will be granted to individuals who (a) are being hired as an employee by the Company or any subsidiary and such award is a material inducement to such person being hired; (b) are being rehired as an employee following a bona fide period of interruption of employment with the Company or any subsidiary; or (c) will become an employee of the Company or any subsidiary in connection with a merger or acquisition.

On July 20, 2022, the Board increased the number of shares of common stock reserved and available for issuance under the 2017 Plan by 2,000,000 shares to a total of 2,600,000 shares approved. As of December 31, 2022, 1,566,170 shares of common stock remain available to be issued through equity-based instruments under the 2017 Plan.

Employee Stock Purchase Plan

In April 2015, the Company’s Board approved the ESPP, under which 600,000 shares of common stock have been reserved for purchase by the Company’s employees, subject to approval by the Company’s stockholders. On May 21, 2015, the Company’s stockholders approved the ESPP. Effective on June 16, 2021, the Company’s stockholders approved the amendment and restatement of the ESPP to increase the number of shares reserved for issuance through equity-based instruments thereunder by 700,000 shares, bringing to 1,550,000 the total number of shares approved for issuance under that plan. Under the ESPP, employees may designate an amount not less than 1% but not more than 10% of their annual compensation for the purchase of Company shares. An offering period shall be six months in duration commencing on or about January 1 and July 1 of each year. The exercise price of the option will be the lesser of 85% of the fair market of the common stock on the first business day of the offering period and 85% of the fair market value of the common stock on the applicable exercise date which is typically the last market date of the offering period.

Note 8 – Stock Based Compensation, continued

Equity Incentive Plans, continued

Employee Stock Purchase Plan, continued

As of December 31, 2022, 201,619 shares of common stock remain eligible to be issued under the ESPP. For the year ended December 31, 2022, eligible employees contributed $272,833 through payroll deductions to the ESPP and 345,929 shares were deemed delivered for the year ended December 31, 2022. For the year ended December 31, 2021, eligible employees contributed $384,126 through payroll deductions to the ESPP and 292,890 shares were deemed delivered for the year ended December 31, 2021.

Stock Option Award Activity

During the year ended December 31, 2022, the Board granted our Chief Executive Officer 300,000 stock options under the 2013 Equity Incentive Plan at an exercise price of $1.27 per share with half of the options vesting on the second anniversary of the vesting start date and a quarter of the options vesting on each of the next two anniversaries of the vesting start date. No options were granted during the years ended December 31, 2022 and 2021.

The Company estimated the fair value of stock options granted during 2022 using the Black-Scholes option pricing model. The fair values of stock options granted during 2022 were estimated using the following assumptions:

	Year Ended December 31, 2022
Stock price	$	1.27
Dividend yield		0	%
Expected volatility		108	%
Risk-free interest rate		1.92	%
Expected life	5.6 years

The following is a summary of the Company’s stock option activity during the year ended December 31, 2022:

	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Life In Years		Intrinsic Value
Outstanding at January 1, 2022		525,006		$	5.77		0.7	$	—
Granted		300,000			1.27		—		—
Exercised		—			—		—		—
Forfeited		(524,744	)		5.77		—		—
Outstanding at December 31, 2022		300,262		$	1.27		8.9	$	—
Exercisable at December 31, 2022		262		$	2.49		1.0	$	—

As of December 31, 2022, the unamortized value of options was $233,689. The unamortized amount will be expensed over a weighted average period of 2.6 years.

The aggregate intrinsic value of options exercised was $0 for the years ended December 31, 2022 and 2021.

Restricted Stock Units (“RSUs”)

During the year ended December 31, 2022, the Compensation Committee granted various employees RSUs under which the holders have the right to receive an aggregate of 1,038,700 shares of common stock. The majority of these awards, granted under the 2013 Equity Incentive Plan, vest over terms ranging from two to four years.

Note 8 – Stock Based Compensation, continued

Restricted Stock Units (“RSUs”), continued

During the year ended December 31, 2022, the Compensation Committee granted various directors and consultants RSUs under which the holders have the right to receive an aggregate 290,055 shares of common stock. These awards were granted under the 2014 Non-Employee Equity Compensation Plan. The awards granted vest over terms from one year to two years.

During the year ended December 31, 2022, the Compensation Committee granted employees RSUs under which the holders have the right to receive 608,500 shares of common stock. The awards, granted under the 2017 Equity Inducement Plan, vest over four years beginning on the anniversary of the grant date.

At December 31, 2022, the unamortized value of the RSUs was $2,475,986. The unamortized amount will be expensed over a weighted average period of 1.8 years. A summary of the activity related to RSUs for the year ended December 31, 2022 is presented below:

	Total			Weighted Average Grant Date Fair Value
Unvested at January 1, 2022		1,709,273		$	3.72
RSUs granted		1,937,255		$	1.21
RSUs forfeited		(458,476	)	$	1.98
RSUs vested		(1,022,920	)	$	4.16
Unvested at December 31, 2022		2,165,132		$	1.63

Performance Share Units (“PSUs”)

Performance share units (“PSUs”) are grants that vest upon the achievement of certain performance goals. The goals are commonly related to the Company’s revenue and achievement of sales and marketing goals.

On July 20, 2022, the Board granted the Company’s Chief Executive Officer, Cesar Johnston, up to 287,000 PSUs under the Company’s 2015 Performance Share Unit Plan pursuant to the terms of Mr. Johnston’s offer letter with the Company (See Note 4 – Commitments and Contingencies). The up to 287,000 PSUs that have been approved shall vest as follows: (a) up to 187,000 PSU shares shall vest on December 31, 2022, subject to Mr. Johnston’s continued service as Chief Executive Officer and the achievement, to be determined in the Compensation Committee’s sole discretion, by Mr. Johnston of certain performance metrics previously determined by the Compensation Committee and approved by the Board, and (b) up to an additional 50,000 PSU shares shall vest on each of December 31, 2023 and December 31, 2024, subject to Mr. Johnston’s continued service as Chief Executive Officer and the achievement, to be determined in the Compensation Committee’s sole discretion, by Mr. Johnston of certain performance metrics to be recommended by the Compensation Committee and approved by the Board at a subsequent date. As of December 31, 2022, only 187,000 PSUs have approved performance criteria. As of December 31, 2022, 135,575 PSUs have been achieved and vested and were deemed delivered on that date. As of December 31,2022, the performance criteria for the additional 100,000 PSUs have not been approved by the Board.

Note 8 – Stock Based Compensation, continued

Performance Share Units (“PSUs”), continued

At December 31, 2022, the unamortized value of all PSUs was $0. A summary of the activity related to PSUs for the year ended December 31, 2022 is presented below:

	Total			Weighted Average Grant Date Fair Value
Unvested at January 1, 2022		—		$	—
PSUs granted		187,000		$	1.02
PSUs forfeited		(51,425	)	$	1.02
PSUs vested		(135,575	)	$	1.02
Unvested at December 31, 2022		—		$	—

Employee Stock Purchase Plan (“ESPP”)

During the years ended December 31, 2022 and 2021, there were two offering periods per year for the ESPP. The first offering period started on January 1 of each year and concluded on June 30 of each year. The second offering period started on July 1 of each year and concluded on December 31 of each year.

The weighted-average grant-date fair value of the purchase option for each designated share purchased under the ESPP was approximately $0.37 and $1.10 during the years ended December 31, 2022 and 2021, respectively, which represents the fair value of the option, consisting of three main components: (i) the value of the discount on the enrollment date, (ii) the proportionate value of the call option for 85% of the stock and (iii) the proportionate value of the put option for 15% of the stock. The Company recognized stock-based compensation expense for the plan of $124,053 and $252,568 for the years ended December 31, 2022 and 2021, respectively.

The Company estimated the fair value of the purchase options granted during the years ended December 31, 2022 and 2021 using the Black-Scholes option pricing model. The fair values of the purchase options granted were estimated using the following assumptions:

	For the Year Ended December 31, 2022
Stock price range	$	0.96 – 1.25
Dividend yield		0	%
Expected volatility range		61 – 68	%
Risk-free interest rate range		0.06 – 2.52	%
Expected life		6 months

	For the Year Ended December 31, 2021
Stock price range	$	1.80 – 2.78
Dividend yield		0	%
Expected volatility range		95 – 143	%
Risk-free interest rate range		0.05 – 0.09	%
Expected life		6 months

Note 8 – Stock Based Compensation, continued

Stock-Based Compensation Expense

The following tables summarize total stock-based compensation costs recognized for years ended December 31, 2022 and 2021:

	For the Years Ended December 31,
	2022		2021
Options	$	74,771	$	284,994
RSUs		2,581,726		5,561,698
PSUs		138,287		5,831,928
ESPP		124,053		252,568
Total	$	2,918,837	$	11,931,188

The total amount of stock-based compensation was reflected within the statements of operations as:

	For the Years Ended December 31,
	2022		2021
Research and development	$	1,134,106	$	6,582,873
Sales and marketing		448,347		3,099,232
General and administrative		1,083,775		1,964,089
Severance expense		252,609		284,994
Total	$	2,918,837	$	11,931,188

Income Taxes

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Income Taxes

Note 9 – Income Taxes

On March 27, 2020, the Coronavirus Aid, Relief and Economic Security (CARES) Act was signed into law. The CARES Act includes provisions relating to refundable payroll tax credits, net operating loss carryback periods, alternative minimum tax refunds, modifications to the net interest deduction limitations and technical corrections to the tax depreciation methods for qualified improvement property. The CARES Act has an immaterial impact on the Company’s income taxes.

The Company accounts for income taxes in accordance with ASC 740, “Income Taxes” (“ASC 740”). ASC 740 requires that the tax benefit of net operating losses, temporary differences and credit carryforwards be recorded as an asset to the extent that management assesses that realization is "more likely than not." Realization of the future tax benefits is dependent on the Company's ability to generate sufficient taxable income within the carryforward period. Because of the Company's recent history of operating losses, management believes that recognition of the deferred tax assets arising from the above-mentioned future tax benefits is currently not likely to be realized and, accordingly, has provided a valuation allowance as of December 31, 2022.

Note 9 – Income Taxes, continued

As of December 31, 2022 and 2021, the Company’s deferred tax assets (liabilities) consisted of the effects of temporary differences attributable to the following:

	December 31,
	2022			2021
Deferred tax assets:
Research and development tax credits	$	10,526,768		$	9,475,588
Net operating loss carryovers		76,477,629			67,785,680
Property and equipment		162,698			189,271
Research and development costs		9,829,326			10,923,959
Start-up and organizational costs		9,275			462
Stock-based compensation		283,285			4,659,555
Operating lease liability		551,284			187,132
Other accruals		464,948			670,065
Total gross deferred tax assets		98,305,213			93,891,712
Less: valuation allowance		(97,756,771	)		(93,718,497	)
Total deferred tax assets		548,442			173,215
Deferred tax liabilities:
Operating lease right-of-use asset		(548,442	)		(173,215	)
Total deferred tax liabilities		(548,442	)		(173,215	)
Total deferred taxes, net	$	—		$	—

The change in the Company’s valuation allowance is as follows:

	2022		2021
January 1,	$	93,718,497	$	82,929,675
Increase in valuation allowance		4,038,274		10,788,822
December 31,	$	97,756,771	$	93,718,497

The Company has federal and state net operating loss carryforwards of approximately $273,056,000 and $274,011,000, respectively, available to offset future taxable income. The federal and state NOL carryforwards will expire at various dates beginning in 2033. The Company has federal and state research and development tax credit carryforwards of approximately $6,373,000 and $5,258,000, respectively. The federal R&D credit carryforwards will expire beginning in 2032 and state R&D credit carryforwards do not expire. The ultimate realization of the net operating loss is dependent upon future taxable income, if any, of the Company. Although management believes that the Company may have sufficient future taxable income to absorb the net operating loss carryforwards and research and development tax credit carryforwards before the expiration of the carryforward period, there may be circumstances beyond the Company’s control that limit such utilization. Accordingly, management has determined that a full valuation allowance of the deferred tax asset is appropriate at December 31, 2022 and 2021.

Note 9 – Income Taxes, continued

Internal Revenue Code Section 382 imposes limitations on the use of net operating loss carryforwards when the stock ownership of one or more 5% stockholders (stockholders owning 5% or more of the Company’s outstanding capital stock) has increased on a cumulative basis by more than 50 percentage points. Management cannot control the ownership changes occurring as a result of public trading of the Company’s Common Stock. Accordingly, there is a risk of an ownership change beyond the control of the Company that could trigger a limitation of the use of the loss carryforward. The Company completed a Section 382 analysis as of December 31, 2022 and determined that none of its NOLs or R&D credits would be limited.

	For the Year Ended December 31,
	2022			2021
Tax benefit at federal statutory rate		(21.0	)%		(21.0	)%
State income taxes		(4.4	)		(5.8	)
Permanent differences:
Stock-based compensation		12.4			1.8
Executive compensation		—			1.6
Research and development tax credits		(2.4	)		(2.7	)
Increase in valuation allowance		15.4			26.1
Effective income tax rate		0.0	%		0.0	%

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 21
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 17
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 14
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 270
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI https://asc.fasb.org/topic&trid=2144680

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Related Party Transactions

12 Months Ended

Dec. 31, 2022

Related Party Transactions

Note 10 – Related Party Transactions

In November 2016, the Company and Dialog entered into the Alliance Agreement for the manufacture, distribution and commercialization of products incorporating the Company’s wire-free charging technology (See Note 6 – Commitments and Contingencies, Strategic Alliance Agreement). On November 7, 2016 and June 28, 2017, the Company and Dialog entered into securities purchase agreements under which Dialog acquired a total of 1,739,691 shares and received warrants to purchase up to 1,417,565 shares. As of December 31, 2022, none of the warrants remain outstanding. Dialog presently owns approximately 2.2% of the Company’s outstanding common shares. The Company incurred $0 and $408,000 in chip development expense from Dialog during the years ended December 31, 2022 and 2021, respectively.

On September 20, 2021, the Company was notified by Dialog, then acquired by Renesas Electronics Corporation, that it was terminating the Alliance Agreement between the Company and Dialog.

Customer Concentration

12 Months Ended

Dec. 31, 2022

Risks And Uncertainties [Abstract]

Customer Concentration

Note 11 – Customer Concentration

One customer accounted for approximately 50% of the Company’s revenue for the year ended December 31, 2022 and three customers accounted for approximately 42% of the Company’s revenue for the year ended December 31, 2021. One customer accounted for approximately 87% of the Company’s accounts receivable balance as of December 31, 2022. Four customers accounted for approximately 68% of the Company’s accounts receivable balance as of December 31, 2021.

Note 12 – Subsequent Events

During the period from January 1, 2023 through March 1, 2023, the Company raised net proceeds of $2,674,683 (net of $68,651 in issuance costs) under its ATM Program. As of March 1, 2023, the Company had $3,526,605 remaining on the ATM Program.

On February 28, 2023, the Company committed to purchase products that will be produced by a contract manufacturer during the second and third quarters of 2023. The total amount of the committed orders is $510,000, and the products produced by the contract manufacturer will be held for future sales.

On March 24, 2023, the Company completed an underwritten offering of its securities (the “Offering”) pursuant to which it sold an aggregate of (i) 8,250,000 shares of its common stock and (ii) warrants to purchase up to 8,250,000 shares of common stock, for aggregate proceeds of approximately $2,689,000, net of commissions and professional fees of approximately $611,000. The warrants issued in the Offering were immediately exercisable and have a term of six years and a per share exercise price of $0.40.

Subsequent Events

12 Months Ended

Dec. 31, 2022

Subsequent Events [Abstract]

Subsequent Events

Note 12 – Subsequent Events

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Basis of Presentation

Use of Estimates

Cash and Cash Equivalents

Revenue Recognition

The Company follows Accounting Standards Codification (“ASC”) Topic 606, "Revenue from Contracts with Customers” (“Topic 606”).

In accordance with Topic 606, the Company recognizes revenue using the following five-step approach:

Identify the contract with the customer.

Identify the performance obligations in the contract.

Determine the transaction price of the contract.

Allocate the transaction price to the performance obligations of the contract.

Recognize revenue when the performance obligations are met or delivered.

Revenue Recognition

Inventory

Research and Development

Stock-Based Compensation

Income Taxes

Net Loss Per Common Share

Note 3 – Summary of Significant Accounting Policies, continued

Net Loss Per Common Share, continued

Potentially dilutive securities outlined in the table below have been excluded from the computation of diluted net loss per share because the effect of their inclusion would have been anti-dilutive.

	For the Years Ended December 31,
	2022		2021
Warrants issued to private investors		1,666,666		3,284,789
Options to purchase common stock		300,262		525,006
RSUs		2,165,132		1,709,273
Total potentially dilutive securities		4,132,060		5,519,068

The table above includes 1,666,666 warrants expiring March 1, 2024, with an exercise price of $10.00.

Leases

Management's Evaluation of Subsequent Events

Management’s Evaluation of Subsequent Events

The Company evaluates events that have occurred after the balance sheet date of December 31, 2022, through the date which the financial statements are issued.

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Note 3 – Summary of Significant Accounting Policies, continued

Net Loss Per Common Share, continued

Potentially dilutive securities outlined in the table below have been excluded from the computation of diluted net loss per share because the effect of their inclusion would have been anti-dilutive.

	For the Years Ended December 31,
	2022		2021
Warrants issued to private investors		1,666,666		3,284,789
Options to purchase common stock		300,262		525,006
RSUs		2,165,132		1,709,273
Total potentially dilutive securities		4,132,060		5,519,068

Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2022

Property Plant And Equipment [Abstract]

Summary of Property and Equipment

Property and equipment are as follows:

	As of December 31,
	2022			2021
Computer software	$	978,147		$	916,498
Computer hardware		2,144,364			2,211,490
Furniture and fixtures		488,465			484,186
Leasehold improvements		782,538			782,538
		4,393,514			4,394,712
Less – accumulated depreciation		(3,964,479	)		(3,884,515	)
Total property and equipment, net	$	429,035		$	510,197

Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2022

Payables And Accruals [Abstract]

Summary of Accrued Expenses

Accrued expenses consist of the following:

	As of December 31,
	2022		2021
Accrued compensation	$	1,306,503	$	1,217,176
Accrued legal expenses		298,546		178,236
Other accrued expenses		185,365		127,905
Total	$	1,790,414	$	1,523,317

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2022

Commitments And Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Note 6 – Commitments and Contingencies, continued

Operating Leases, continued

Operating Lease Commitments, continued

The future minimum lease payments for leased locations are as follows:

For the Year Ended December 31,	Amount
2023	$	752,828
2024		733,497
2025		562,408
Total future lease payments		2,048,733
Present value discount (2.9% weighted average)		(78,708	)
Total operating lease liabilities	$	1,970,025

Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Summary of Fair Values of Stock Options Granted

	Year Ended December 31, 2022
Stock price	$	1.27
Dividend yield		0	%
Expected volatility		108	%
Risk-free interest rate		1.92	%
Expected life	5.6 years

Summary of Stock Option Activity

The following is a summary of the Company’s stock option activity during the year ended December 31, 2022:

	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Life In Years		Intrinsic Value
Outstanding at January 1, 2022		525,006		$	5.77		0.7	$	—
Granted		300,000			1.27		—		—
Exercised		—			—		—		—
Forfeited		(524,744	)		5.77		—		—
Outstanding at December 31, 2022		300,262		$	1.27		8.9	$	—
Exercisable at December 31, 2022		262		$	2.49		1.0	$	—

Schedule of Restricted Stock Units Activity

A summary of the activity related to RSUs for the year ended December 31, 2022 is presented below:

	Total			Weighted Average Grant Date Fair Value
Unvested at January 1, 2022		1,709,273		$	3.72
RSUs granted		1,937,255		$	1.21
RSUs forfeited		(458,476	)	$	1.98
RSUs vested		(1,022,920	)	$	4.16
Unvested at December 31, 2022		2,165,132		$	1.63

Summary of Activity Related to PSUs

A summary of the activity related to PSUs for the year ended December 31, 2022 is presented below:

	Total			Weighted Average Grant Date Fair Value
Unvested at January 1, 2022		—		$	—
PSUs granted		187,000		$	1.02
PSUs forfeited		(51,425	)	$	1.02
PSUs vested		(135,575	)	$	1.02
Unvested at December 31, 2022		—		$	—

Summary of Stock-based Compensation Costs Recognized

The following tables summarize total stock-based compensation costs recognized for years ended December 31, 2022 and 2021:

	For the Years Ended December 31,
	2022		2021
Options	$	74,771	$	284,994
RSUs		2,581,726		5,561,698
PSUs		138,287		5,831,928
ESPP		124,053		252,568
Total	$	2,918,837	$	11,931,188

Summary of Stock-based Compensation Reflected within Statements of Operations

The total amount of stock-based compensation was reflected within the statements of operations as:

	For the Years Ended December 31,
	2022		2021
Research and development	$	1,134,106	$	6,582,873
Sales and marketing		448,347		3,099,232
General and administrative		1,083,775		1,964,089
Severance expense		252,609		284,994
Total	$	2,918,837	$	11,931,188

Employee Stock Purchase Plan [Member]

Summary of Fair Values of Stock Options Granted

The fair values of the purchase options granted were estimated using the following assumptions:

	For the Year Ended December 31, 2022
Stock price range	$	0.96 – 1.25
Dividend yield		0	%
Expected volatility range		61 – 68	%
Risk-free interest rate range		0.06 – 2.52	%
Expected life		6 months

	For the Year Ended December 31, 2021
Stock price range	$	1.80 – 2.78
Dividend yield		0	%
Expected volatility range		95 – 143	%
Risk-free interest rate range		0.05 – 0.09	%
Expected life		6 months

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Deferred Tax Assets and Liabilities

As of December 31, 2022 and 2021, the Company’s deferred tax assets (liabilities) consisted of the effects of temporary differences attributable to the following:

	December 31,
	2022			2021
Deferred tax assets:
Research and development tax credits	$	10,526,768		$	9,475,588
Net operating loss carryovers		76,477,629			67,785,680
Property and equipment		162,698			189,271
Research and development costs		9,829,326			10,923,959
Start-up and organizational costs		9,275			462
Stock-based compensation		283,285			4,659,555
Operating lease liability		551,284			187,132
Other accruals		464,948			670,065
Total gross deferred tax assets		98,305,213			93,891,712
Less: valuation allowance		(97,756,771	)		(93,718,497	)
Total deferred tax assets		548,442			173,215
Deferred tax liabilities:
Operating lease right-of-use asset		(548,442	)		(173,215	)
Total deferred tax liabilities		(548,442	)		(173,215	)
Total deferred taxes, net	$	—		$	—

Summary of Valuation Allowance

The change in the Company’s valuation allowance is as follows:

	2022		2021
January 1,	$	93,718,497	$	82,929,675
Increase in valuation allowance		4,038,274		10,788,822
December 31,	$	97,756,771	$	93,718,497

Schedule of Effective Income Tax Rate Reconciliation

	For the Year Ended December 31,
	2022			2021
Tax benefit at federal statutory rate		(21.0	)%		(21.0	)%
State income taxes		(4.4	)		(5.8	)
Permanent differences:
Stock-based compensation		12.4			1.8
Executive compensation		—			1.6
Research and development tax credits		(2.4	)		(2.7	)
Increase in valuation allowance		15.4			26.1
Effective income tax rate		0.0	%		0.0	%

Liquidity and Management Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Liquidity And Management Plans [Line Items]
Engineering product development	$ 851,321	$ 756,793
Net loss	(26,275,260)	(41,427,293)
Net cash provided by (used in) operating activities	(23,636,747)	(28,720,389)
Proceeds of securities offerings	27,043,751	744,787
Cash and cash equivalents, at carrying value, total	26,287,293	49,071,414
Technology Service [Member]
Liquidity And Management Plans [Line Items]
Engineering product development	$ 851,321	$ 756,793

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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+ Details

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Significant Accounting Policies - Additional Information (Detail) - USD ($)		12 Months Ended
	Apr. 30, 2015	Dec. 31, 2022	Dec. 31, 2021
Summary Of Significant Accounting Policies [Line Items]
Revenue		$ 851,321	$ 756,793
Research and development expense, total		12,497,781	20,572,580
Liability for unrecognized tax benefits		0
Interest or penalties for uncertain tax positions		$ 0	$ 0
Antidilutive securities excluded from computation of earnings per share, amount		4,132,060	5,519,068
Warrants Issued to Private Investors [Member]
Summary Of Significant Accounting Policies [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount		1,666,666	3,284,789
Warrants Issued to Private Investors [Member] \| Expiring at October 6 2022
Summary Of Significant Accounting Policies [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount		1,618,123
Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1		$ 23.00
Warrants Issued to Private Investors [Member] \| Expiring at March 1 2024
Summary Of Significant Accounting Policies [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount		1,666,666
Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1		$ 10.00
Employee Stock Purchase Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Common stock purchase price discount percentage	85.00%	15.00%
Product Development Projects Revenue [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue		$ 851,321	$ 756,793

Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Summary Of Significant Accounting Policies [Line Items]
Total potentially dilutive securities	4,132,060	5,519,068
Warrants Issued to Private Investors [Member]
Summary Of Significant Accounting Policies [Line Items]
Total potentially dilutive securities	1,666,666	3,284,789
Employee Stock Option [Member]
Summary Of Significant Accounting Policies [Line Items]
Total potentially dilutive securities	300,262	525,006
Restricted Stock Units (RSUs) [Member]
Summary Of Significant Accounting Policies [Line Items]
Total potentially dilutive securities	2,165,132	1,709,273

Property and Equipment - Summary of Property and Equipment (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross, Total	$ 4,393,514	$ 4,394,712
Less – accumulated depreciation	(3,964,479)	(3,884,515)
Total property and equipment, net	429,035	510,197
Computer Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross, Total	978,147	916,498
Computer Hardware [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross, Total	2,144,364	2,211,490
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross, Total	488,465	484,186
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross, Total	$ 782,538	$ 782,538

Property and Equipment - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 246,156	$ 258,249
Computer Hardware and Software [Member]
Property, Plant and Equipment [Line Items]
Disposal of property, plant and equipment	$ 166,192	$ 130,341
Computer Hardware [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	7 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	remaining life of the lease.
Minimum [Member] \| Computer Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	1 year
Maximum [Member] \| Computer Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	2 years

Accrued Expenses - Summary of Accrued Expenses (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Payables And Accruals [Abstract]
Accrued compensation	$ 1,306,503	$ 1,217,176
Accrued legal expenses	298,546	178,236
Other accrued expenses	185,365	127,905
Total	$ 1,790,414	$ 1,523,317

Commitments and Contingencies - Operating Leases - Additional Information (Detail) - USD ($)		1 Months Ended
	Oct. 01, 2021	Oct. 31, 2022	Oct. 31, 2019	Dec. 31, 2022	May 20, 2022	Dec. 31, 2021	Oct. 31, 2021	Jul. 15, 2019
Commitments And Contingencies [Line Items]
Operating right-of-use lease assets				$ 1,959,869		$ 618,985
Operating lease liabilities, current portion				705,894		628,307
Total operating lease payments				2,048,733
Long-term portion of operating lease liabilities				1,264,131		$ 40,413
Accounting Standards Update 2016-02
Commitments And Contingencies [Line Items]
Operating right-of-use lease assets				1,959,869
Operating lease liabilities, current portion				705,894
Total operating lease payments				2,048,733
Long-term portion of operating lease liabilities				$ 1,264,131
Weighted average remaining lease term				2 years 8 months 12 days
San Jose, California [Member]
Commitments And Contingencies [Line Items]
Operating lease, renewal term					3 years
Operating right-of-use lease assets					$ 2,071,336
Operating lease liabilities, current portion					$ 2,071,336
Operating lease present value discount rate					3.00%
Operating lease payment		$ 58,903
San Jose, California [Member] \| Maximum [Member]
Commitments And Contingencies [Line Items]
Maximum monthly lease payment		$ 62,490
Costa Mesa, California [Member]
Commitments And Contingencies [Line Items]
Operating lease, renewal term								2 years
Operating right-of-use lease assets							$ 104,563
Operating lease liabilities, current portion							$ 104,563
Operating lease payment	$ 4,369		$ 9,773
Costa Mesa, California [Member] \| Maximum [Member]
Commitments And Contingencies [Line Items]
Maximum monthly lease payment	$ 4,522		$ 10,200

Commitments and Contingencies - Schedule of Future Minimum Rental Payments for Operating Leases (Detail)	Dec. 31, 2022 USD ($)
Operating Leases Future Minimum Payments Due [Abstract]
2023	$ 752,828
2024	733,497
2025	562,408
Total future lease payments	2,048,733
Present value discount (2.9% weighted average)	(78,708)
Total operating lease liabilities	$ 1,970,025

Commitments and Contingencies - Hosted Design Solution Agreement - Additional Information (Detail)	1 Months Ended
	Jun. 30, 2021 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Additional term of agreement	3 years
Quarterly payments for service agreement	$ 233,000

Commitments and Contingencies - MBO Bonus Plan - Additional Information (Detail) - Executive Officers [Member] - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Commitments And Contingencies [Line Items]
Expense recognized by company	$ 1,293,875	$ 1,433,990
Accrued Expenses [Member]
Commitments And Contingencies [Line Items]
Bonus accrued but not yet paid	$ 688,364

Commitments and Contingencies - Executive Employee Agreement - Cesar Johnston - Additional Information (Detail)			12 Months Ended
	Jul. 20, 2022 shares	Dec. 09, 2021 USD ($) Installment shares	Dec. 31, 2024 shares	Dec. 31, 2023 shares	Dec. 31, 2022 USD ($) shares
Performance Share Unit (PSUs) [Member]
Commitments And Contingencies [Line Items]
Shares granted					187,000
Shares vested					135,575
Performance Share Unit (PSUs) [Member] \| Share Based Compensation [Member]
Commitments And Contingencies [Line Items]
Shares vested					100,000
Mr. Johnston [Member]
Commitments And Contingencies [Line Items]
Salary \| $		$ 400,000
Annual bonus, percentage		100.00%
One time sign on bonus amount \| $		$ 120
Bonus payable, number of installments \| Installment		2
Bonus payable installment amount \| $		$ 60
Debt description					a grant of 150,000 restricted stock units to acquire shares of the Company’s common stock, one third of which vested on December 6, 2022 and the remaining two thirds of which will vest in eight equal installments of 12,500 each on each quarterly anniversary thereafter
Options granted		300,000
Target bonus percentage		100.00%
Mr. Johnston [Member] \| Johnston A&R CIC Agreement [Member]
Commitments And Contingencies [Line Items]
Target bonus percentage		150.00%
Mr. Johnston [Member] \| Performance Share Unit (PSUs) [Member]
Commitments And Contingencies [Line Items]
Additional equity award		287,000
Vesting percentage		33.30%
Vesting period		3 years
Additional equity award per year.		25,000
Shares granted	287,000				287,000
Shares vested		135,575			287,000
Accrued bonuses \| $					$ 360,000
Shares authorized		187,000			187,000
Mr. Johnston [Member] \| Performance Share Unit (PSUs) [Member] \| One Time Bonus [Member]
Commitments And Contingencies [Line Items]
Accrued bonuses \| $					$ 120,000
Mr. Johnston [Member] \| Performance Share Unit (PSUs) [Member] \| Maximum [Member]
Commitments And Contingencies [Line Items]
Shares vested					187,000
Mr. Johnston [Member] \| Performance Share Unit (PSUs) [Member] \| Maximum [Member] \| Forecast
Commitments And Contingencies [Line Items]
Shares vested			50,000	50,000
Mr. Johnston [Member] \| Performance Share Unit (PSUs) [Member] \| Share Based Compensation [Member] \| Forecast
Commitments And Contingencies [Line Items]
Shares vested			50,000	50,000

Commitments and Contingencies - Employee Agreement - Stephen Rizzone - Additional Information (Detail) - USD ($)			12 Months Ended
	Jul. 09, 2021	Jan. 01, 2015	Dec. 31, 2022	Dec. 31, 2021
Commitments And Contingencies [Line Items]
Severance expense			$ 798,391	$ 4,017,172
Stock-based compensation - stock options			74,771	284,994
Accrued severance			416,516	975,439
Mr. Rizzone [Member]
Commitments And Contingencies [Line Items]
Agreement effective date		Jan. 01, 2015
Initial term of agreement		4 years
Officers' compensation				$ 365,000
Employment agreement percentage of base salary				100.00%
Severance expense				$ 4,017,172
Stock-based compensation - stock options				$ 284,994
Accrued severance			$ 411,607
Mr. Rizzone [Member] \| Separation Agreement
Commitments And Contingencies [Line Items]
Compensation-based payments	$ 1,460,000
Additional lump sum cash payment	$ 2,000,000
Description of other commitments	a pro-rated bonus payment for the two months of employment during the current quarterly bonus period payable at the same time bonus payments are made to other executives of the Company, settlement of deferred vested restricted stock units and an extension of the exercise periods of all stock options held by Mr. Rizzone until the one year anniversary of his termination date, and additional benefits related to Mr. Rizzone’s medical insurance.

Commitments and Contingencies - Employee Agreement - Neeraj Sahejpal - Additional Information (Detail) - USD ($)		12 Months Ended
	Apr. 29, 2022	Dec. 31, 2022	Dec. 31, 2021
Commitments And Contingencies [Line Items]
Severance expense		$ 798,391	$ 4,017,172
Accrued severance expense		416,516	975,439
Restricted Stock Units (RSUs) [Member]
Commitments And Contingencies [Line Items]
Compensation-based payments		2,581,726	$ 5,561,698
Mr. Neeraj Sahejpal [Member]
Commitments And Contingencies [Line Items]
Salary	$ 261,250
Potential bonus	$ 261,250
Severance expense		798,391
Compensation-based payments		252,609
Mr. Neeraj Sahejpal [Member] \| Restricted Stock Units (RSUs) [Member]
Commitments And Contingencies [Line Items]
Shares vested	85,943
Accrued severance expense		$ 4,909

Commitments and Contingencies - Strategic Alliance Agreement - Additional Information (Detail)	1 Months Ended
	Nov. 30, 2016
Strategic Alliance Agreement [Member]
Commitments And Contingencies [Line Items]
Initial term of agreement	7 years

Stockholders' Equity - Additional Information (Detail)				3 Months Ended		12 Months Ended
Stockholders' Equity - Additional Information (Detail)	Dec. 16, 2021 USD ($)	Oct. 04, 2021 USD ($)	Sep. 24, 2020 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2022 USD ($) Vote shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020	Jul. 24, 2020 shares
Class of Stock [Line Items]
Number of common stock voting entitlement per share \| Vote						1
Securities reserved for issuance	$ 100,000,000
At-the-market ("ATM") funds receivable				$ 38,832,711	$ 38,832,711
Accounting issuance costs will be paid			$ 1,167,289
Issuance of shares in an at-the-market ("ATM") placement, net of issuance costs						$ 744,787	$ 27,043,751
Common stock outstanding abstract						Our outstanding shares of common stock typically include shares that are deemed delivered under U.S. GAAP. Shares that are deemed delivered currently include shares that have vested, but have not yet been delivered, under tax-deferred equity awards, as well as shares purchased under the ESPP where actual transfer of shares normally occurs a few days after the completion of the purchase periods. There are no voting rights for shares that are deemed delivered under U.S. GAAP until the actual delivery of shares takes place. There are currently 200,000,000 shares of common stock authorized for issuance.
Common stock, shares authorized \| shares						200,000,000	200,000,000		200,000,000
Maximum [Member]
Class of Stock [Line Items]
Securities reserved for issuance			75,000,000
Sales Agreement [Member]
Class of Stock [Line Items]
Proceeds from (Payments for) in Securities Sold under Agreements						$ 6,269,937
Sale of stock, Description								The $40,000,000 of common stock to be offered, issued and sold under the ATM Program is included in the $75,000,000 of securities that may be offered, issued and sold by the Company under the base prospectus.
Issuance of shares in an at-the-market ("ATM") placement, net of issuance costs						744,787	$ 27,043,751
Net of issuance costs from offering of shares						$ 73,403	$ 868,122
Sales Agreement [Member] \| Maximum [Member]
Class of Stock [Line Items]
Proceeds from (Payments for) in Securities Sold under Agreements		$ 35,000,000	$ 40,000,000

Stock Based Compensation - Equity Incentive Plan - Additional Information (Detail) - USD ($)		12 Months Ended
	Apr. 30, 2015	Dec. 31, 2022	Dec. 31, 2021	Jul. 20, 2022	Jun. 16, 2021	May 26, 2020	Dec. 28, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee contribution through payroll withholdings		$ 272,833	$ 384,126
2015 Performance Share Unit Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance					1,700,000
Share-based compensation arrangement by share-based payment award, number of shares authorized for issuance					5,110,104
Common stock remain eligible to be issued		2,275,438
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		1,937,255
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance	600,000				700,000
Share-based compensation arrangement by share-based payment award, number of shares authorized for issuance					1,550,000
Common stock remain eligible to be issued		201,619
Lowest percentage of annual compensation to be utilized by an employee for purchase of shares under the plan	1.00%
Highest percentage of annual compensation to be utilized by an employee for purchase of shares under the plan	10.00%
Vesting period	6 months
Exercise price discount from fair value on offering date	85.00%
Exercise price discount from fair value on exercise date	85.00%	15.00%
Share-based compensation arrangement by share-based payment award, terms of award		In April 2015, the Company’s Board approved the ESPP, under which 600,000 shares of common stock have been reserved for purchase by the Company’s employees, subject to approval by the Company’s stockholders. On May 21, 2015, the Company’s stockholders approved the ESPP. Effective on June 16, 2021, the Company’s stockholders approved the amendment and restatement of the ESPP to increase the number of shares reserved for issuance through equity-based instruments thereunder by 700,000 shares, bringing to 1,550,000 the total number of shares approved for issuance under that plan. Under the ESPP, employees may designate an amount not less than 1% but not more than 10% of their annual compensation for the purchase of Company shares. An offering period shall be six months in duration commencing on or about January 1 and July 1 of each year. The exercise price of the option will be the lesser of 85% of the fair market of the common stock on the first business day of the offering period and 85% of the fair market value of the common stock on the applicable exercise date which is typically the last market date of the offering period.
Shares granted		345,929	292,890
2013 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance					1,500,000
Share-based compensation arrangement by share-based payment award, number of shares authorized for issuance					8,785,967
Common stock remain eligible to be issued		1,294,884
Non-Employee Equity Compensation Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance						800,000
Share-based compensation arrangement by share-based payment award, number of shares authorized for issuance						1,650,000
Common stock remain eligible to be issued		670,690
2017 Equity Inducement Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance				2,000,000
Share-based compensation arrangement by share-based payment award, number of shares authorized for issuance				2,600,000
Common stock remain eligible to be issued		1,566,170
2017 Equity Inducement Plan [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance							600,000

Stock Based Compensation - Summary of Fair Values of Stock Options Granted (Detail) - Employee Stock Option [Member]	12 Months Ended
	Dec. 31, 2022 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price	$ 1.27
Dividend yield	0.00%
Expected volatility	108.00%
Risk-free interest rate	1.92%
Expected life	5 years 7 months 6 days

Stock Based Compensation - Summary of Stock Option Activity (Detail) - Employee Stock Option [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding	525,006
Number of Options, Granted	300,000
Number of Options, Exercised	0
Number of Options, Forfeited	(524,744)
Number of Options, Outstanding	300,262	525,006
Number of Options, Exercisable	262
Weighted Average Exercise Price, Outstanding	$ 5.77
Weighted Average Exercise Price, Granted	1.27
Weighted Average Exercise Price, Exercised	0
Weighted Average Exercise Price, Forfeited	5.77
Weighted Average Exercise Price, Outstanding	1.27	$ 5.77
Weighted Average Exercise Price, Exercisable	$ 2.49
Weighted Average Remaining Life In Years, Outstanding	8 years 10 months 24 days	8 months 12 days
Weighted Average Remaining Life In Years, Exercisable	1 year

Stock Based Compensation - Stock Option Award Activity - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value	$ 0	$ 0
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Granted	300,000
Exercise price per share of shares granted	$ 1.27
2013 Equity Incentive Plan [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Granted	0	0
2013 Equity Incentive Plan [Member] \| Employee Stock Option [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Granted	300,000
Exercise price per share of shares granted	$ 1.27
Share-based compensation arrangement by share-based payment award, award vesting description	half of the options vesting on the second anniversary of the vesting start date and a quarter of the options vesting on each of the next two anniversaries
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation, nonvested awards, compensation not yet recognized, stock options	$ 233,689	$ 233,689
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	2 years 7 months 6 days

Stock Based Compensation - Restricted Stock Units - Additional Information (Detail) - Restricted Stock Units (RSUs) [Member]	12 Months Ended
	Dec. 31, 2022 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation, nonvested awards, compensation not yet recognized, share-based awards other than options \| $	$ 2,475,986
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	1 year 9 months 18 days
2013 Equity Incentive Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	2 years
2013 Equity Incentive Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	4 years
2013 Equity Incentive Plan [Member] \| Employee [Member] \| Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period	1,038,700
Non-Employee Equity Compensation Plan 2014 [Member] \| Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period	290,055
Non-Employee Equity Compensation Plan 2014 [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	1 year
Non-Employee Equity Compensation Plan 2014 [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	2 years
2017 Equity Inducement Plan [Member] \| Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period	608,500
Share-based compensation arrangement by share-based payment award, award vesting period	4 years

Stock Based Compensation - Schedule of Restricted Stock Units Activity (Detail) - Restricted Stock Units (RSUs) [Member]	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at January 1, 2022 \| shares	1,709,273
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period \| shares	1,937,255
RSUs forfeited \| shares	(458,476)
RSUs vested \| shares	(1,022,920)
Unvested at December 31, 2022 \| shares	2,165,132
Weighted Average Grant Date Fair Value, Beginning Balance \| $ / shares	$ 3.72
Weighted Average Grant Date Fair Value, RSUs granted \| $ / shares	1.21
Weighted Average Grant Date Fair Value, RSUs forfeited \| $ / shares	1.98
Weighted Average Grant Date Fair Value, RSUs vested \| $ / shares	4.16
Weighted Average Grant Date Fair Value, Ending Balance \| $ / shares	$ 1.63

Stock Based Compensation - Performance Share Units - Additional Information (Detail) - Performance Shares [Member] - USD ($)			12 Months Ended
	Jul. 20, 2022	Dec. 09, 2021	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement by share based payment award equity instruments other than options vested in period					187,000
Share based compensation arrangement by share based payment award equity instruments other than options vested in period					135,575
Share based compensation arrangement by share based payment award unamortized value					$ 0
Share Based Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement by share based payment award equity instruments other than options vested in period					100,000
Mr. Johnston [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement by share based payment award equity instruments other than options vested in period	287,000				287,000
Share based compensation arrangement by share based payment award equity instruments other than options vested in period		135,575			287,000
Share based compensation arrangement by share based payment award number of shares authorized		187,000			187,000
Mr. Johnston [Member] \| Forecast \| Share Based Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement by share based payment award equity instruments other than options vested in period			50,000	50,000
Mr. Johnston [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement by share based payment award equity instruments other than options vested in period					187,000
Mr. Johnston [Member] \| Maximum [Member] \| Forecast
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement by share based payment award equity instruments other than options vested in period			50,000	50,000

Stock Based Compensation - Summary of Activity Related to PSUs (Detail) - Performance Shares [Member]	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at January 1, 2022 \| shares	0
PSUs granted \| shares	187,000
PSUs forfeited \| shares	(51,425)
PSUs vested \| shares	(135,575)
Unvested at December 31, 2022 \| shares	0
Weighted Average Grant Date Fair Value, Beginning Balance \| $ / shares	$ 0
Weighted Average Grant Date Fair Value, PSUs granted \| $ / shares	1.02
Weighted Average Grant Date Fair Value, PSUs forfeited \| $ / shares	1.02
Weighted Average Grant Date Fair Value, PSUs vested \| $ / shares	1.02
Weighted Average Grant Date Fair Value, Ending Balance \| $ / shares	$ 0

Stock Based Compensation - Employee Stock Purchase Plan - Additional Information (Detail) - Employee Stock Purchase Plan [Member] - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value	$ 0.37	$ 1.10
Percentage of proportionate value of call option of stock	85.00%
Percentage of proportionate value of put option of stock	15.00%
Compensation-based payments	$ 124,053	$ 252,568

Stock Based Compensation - Summary of Fair Values of Purchase Options Granted (Detail) - Employee Stock Option [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price	$ 1.27
Dividend yield	0.00%
Expected volatility	108.00%
Risk-free interest rate	1.92%
Expected life	5 years 7 months 6 days
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.00%	0.00%
Expected life	6 months	6 months
Employee Stock Purchase Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price	$ 0.96	$ 1.80
Expected volatility	95.00%	95.00%
Risk-free interest rate	0.05%	0.05%
Employee Stock Purchase Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price	$ 2.78	$ 2.78
Expected volatility	143.00%	143.00%
Risk-free interest rate	0.09%	0.09%

Stock Based Compensation -Summary of Stock-based Compensation Costs Recognized (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Options	$ 74,771	$ 284,994
Total	2,918,837	11,931,188
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation-based payments	2,581,726	5,561,698
Performance Share Unit (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation-based payments	138,287	5,831,928
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation-based payments	$ 124,053	$ 252,568

Stock Based Compensation - Summary of Stock-based Compensation Reflected within Statements of Operations (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Severance expense	$ 252,609	$ 284,994
Share-based Compensation, Total	2,918,837	11,931,188
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation-based payments	1,134,106	6,582,873
Selling and Marketing Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation-based payments	448,347	3,099,232
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation-based payments	$ 1,083,775	$ 1,964,089

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Contingency [Line Items]
Tax Cuts and Jobs Act of 2017 Accounting Complete	true
Deferred tax assets, tax credit carryforwards, research	$ 10,526,768	$ 9,475,588
Tax credit carry forward expiration period	2033
Operating loss carryforwards, limitations on use	stock ownership of one or more 5% stockholders (stockholders owning 5% or more of the Company’s outstanding capital stock) has increased on a cumulative basis by more than 50 percentage points
Domestic Tax Authority [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards	$ 273,056,000
Deferred tax assets, tax credit carryforwards, research	$ 6,373,000
Tax credit research and development expiration period	2032
State and Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards	$ 274,011,000
Deferred tax assets, tax credit carryforwards, research	$ 5,258,000

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Research and development tax credits	$ 10,526,768	$ 9,475,588
Net operating loss carryovers	76,477,629	67,785,680
Property and equipment	162,698	189,271
Research and development costs	9,829,326	10,923,959
Start-up and organizational costs	9,275	462
Stock-based compensation	283,285	4,659,555
Operating lease liability	551,284	187,132
Other accruals	464,948	670,065
Total gross deferred tax assets	98,305,213	93,891,712
Less: valuation allowance	(97,756,771)	(93,718,497)	$ (82,929,675)
Total deferred tax assets	548,442	173,215
Deferred tax liabilities:
Operating lease right-of-use asset	(548,442)	(173,215)
Total deferred tax liabilities	(548,442)	(173,215)
Total deferred taxes, net	$ 0	$ 0

Income Taxes - Summary of Valuation Allowance (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
January 1,	$ 93,718,497	$ 82,929,675
Increase in valuation allowance	4,038,274	10,788,822
December 31,	$ 97,756,771	$ 93,718,497

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Tax benefit at federal statutory rate	(21.00%)	(21.00%)
State income taxes	(4.40%)	(5.80%)
Permanent differences:
Stock-based compensation	12.40%	1.80%
Executive compensation		1.60%
Research and development tax credits	(2.40%)	(2.70%)
Increase in valuation allowance	15.40%	26.10%
Effective income tax rate	0.00%	0.00%

Related Party Transactions - Additional Information (Detail) - USD ($)	8 Months Ended	12 Months Ended
	Jun. 28, 2017	Dec. 31, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Cost of revenue		$ 1,277,565
Dialog Semiconductor Plc [Member]
Related Party Transaction [Line Items]
Equity method investment, ownership percentage		2.20%
Dialog Semiconductor Plc [Member]
Related Party Transaction [Line Items]
Warrants outstanding		0
Chip Development Expense \| Dialog Semiconductor Plc [Member]
Related Party Transaction [Line Items]
Cost of revenue		$ 0	$ 408,000
Private Placements [Member] \| Dialog Semiconductor Plc [Member]
Related Party Transaction [Line Items]
Stock issued during period, shares, new issues	1,739,691
Private Placements [Member] \| Warrant Issued to Private Investors [Member] \| Dialog Semiconductor Plc [Member]
Related Party Transaction [Line Items]
Class of warrant or right, number of securities called by warrants or rights	1,417,565

Customer Concentration - Additional Information (Detail) - Customer Concentration Risk [Member] - Customer	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenues [Member] \| Three Customer [Member]
Concentration Risk [Line Items]
Number of customers	1	3
Concentration percentage	50.00%	42.00%
Accounts Receivable [Member] \| Four Customer [Member]
Concentration Risk [Line Items]
Number of customers	1	4
Concentration percentage	87.00%	68.00%

Subsequent Events - Additional Information (Detail) - USD ($)				2 Months Ended	12 Months Ended
	Mar. 24, 2023	Feb. 28, 2023	Dec. 16, 2021	Mar. 01, 2023	Dec. 31, 2022	Dec. 31, 2021
Subsequent Event [Line Items]
Proceeds of securities offerings					$ 27,043,751	$ 744,787
Common stock, shares issued					78,944,954	76,667,205
Securities reserved for issuance			$ 100,000,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Proceeds of securities offerings				$ 2,674,683
Net of stock issuance costs				68,651
Remaining securities at the market offering				$ 3,526,605
Amount of committed orders for future sales		$ 510,000
Common stock, shares issued	8,250,000
Class of warrant or right, number of securities called by warrants or rights	8,250,000
Securities reserved for issuance	$ 2,689,000
Net of commissions and professional fees	$ 611,000
Warrants exercisable term	6 years
Class of warrant or right, exercise price of warrants or rights	$ 0.40