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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2020	May 06, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Trading Symbol	WATT
Entity Registrant Name	Energous Corp
Entity Central Index Key	0001575793
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		41,324,493
Title of 12(b) Security	Common Stock, $0.00001 par value
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
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 Quarterly Report	true
Document Transition Report	false

Balance Sheets - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 19,963,917	$ 21,684,089
Accounts receivable	59,173	63,144
Prepaid expenses and other current assets	352,019	450,231
Total current assets	20,375,109	22,197,464
Property and equipment, net	504,825	626,524
Operating lease right-of-use assets	1,869,131	2,057,576
Other assets	2,410	2,410
Total assets	22,751,475	24,883,974
Current liabilities:
Accounts payable	1,038,251	1,671,519
Accrued expenses	1,435,045	2,063,097
Operting lease liabilities, current portion	762,822	722,291
Deferred revenue	12,000	12,000
Total current liabilities	3,248,118	4,468,907
Operating lease liabilities, long-term portion	1,191,981	1,402,193
Total liabilities	4,440,099	5,871,100
Commitments and contingencies
Stockholders’ equity:
Preferred Stock, $0.00001 par value, 10,000,000 shares authorized at March 31, 2020 and December 31, 2019; no shares issued or outstanding
Common Stock, $0.00001 par value, 50,000,000 shares authorized at March 31, 2020 and December 31, 2019; 37,952,017 and 33,203,806 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively.	381	333
Additional paid-in capital	290,049,391	282,153,201
Accumulated deficit	(271,738,396)	(263,140,660)
Total stockholders’ equity	18,311,376	19,012,874
Total liabilities and stockholders’ equity	$ 22,751,475	$ 24,883,974

Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
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	50,000,000	50,000,000
Common stock, shares issued	37,952,017	33,203,806
Common stock, shares outstanding	37,952,017	33,203,806

Condensed Statements of Operations - USD ($)	3 Months Ended
Condensed Statements of Operations - USD ($)	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 61,475	$ 66,500
Operating expenses:
Research and development	4,575,303	6,800,678
Sales and marketing	1,447,909	1,599,452
General and administrative	2,652,394	2,761,911
Cost of services revenue	39,544
Total operating expenses	8,715,150	11,162,041
Loss from operations	(8,653,675)	(11,095,541)
Other income:
Interest income	55,939	76,073
Total other income	55,939	76,073
Net loss	$ (8,597,736)	$ (11,019,468)
Basic and diluted loss per common share	$ (0.25)	$ (0.39)
Weighted average shares outstanding, basic and diluted	34,816,553	27,939,166

Condensed Statement of Changes in Stockholders' Equity - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2018	$ 18,370,435	$ 265	$ 243,111,741	$ (224,741,571)
Beginning balance (in shares) at Dec. 31, 2018		26,526,303
Stock-based compensation - restricted stock units ("RSUs")	3,083,567		3,083,567
Stock-based compensation - employee stock purchase plan ("ESPP")	87,825		87,825
Issuance of shares for RSUs		$ 4	(4)
Issuance of shares for RSUs (in shares)		434,522
Shares withheld for payroll tax on RSUs	(10,207)		(10,207)
Shares withheld for payroll tax on RSUs (in shares)		(1,329)
Shares withheld for payroll tax on performance share units ("PSUs")	(329,159)		(329,159)
Shares withheld for payroll tax on performance share units ("PSUs") (in shares)		(44,481)
Exercise of stock options	400,103	$ 1	400,102
Exercise of stock options (in shares)		80,201
Proceeds from contributions to the ESPP	173,167		173,167
Issuance of shares and warrants in a private placement, net of issuance costs	23,319,156	$ 33	23,319,123
Issuance of shares and warrants in a private placements, net of issuance costs (in shares)		3,333,333
Net loss	(11,019,468)			(11,019,468)
Ending balance at Mar. 31, 2019	34,075,419	$ 303	269,836,155	(235,761,039)
Ending balance (in shares) at Mar. 31, 2019		30,328,549
Beginning balance at Dec. 31, 2019	19,012,874	$ 333	282,153,201	(263,140,660)
Beginning balance (in shares) at Dec. 31, 2019		33,203,806
Stock-based compensation - restricted stock units ("RSUs")	2,321,820		2,321,820
Stock-based compensation - performance share units ("PSUs")	(88,348)		(88,348)
Stock-based compensation - employee stock purchase plan ("ESPP")	42,827		42,827
Issuance of shares for RSUs		$ 4	(4)
Issuance of shares for RSUs (in shares)		396,559
Proceeds from contributions to the ESPP	113,059		113,059
Issuance of shares in an at-the-market ("ATM") offering, net of issuance costs	5,506,880	$ 44	5,506,836
Issuance of shares in an at-the-market ("ATM") offering, net of issuance costs (in shares)		4,351,652
Net loss	(8,597,736)			(8,597,736)
Ending balance at Mar. 31, 2020	$ 18,311,376	$ 381	$ 290,049,391	$ (271,738,396)
Ending balance (in shares) at Mar. 31, 2020		37,952,017

Condensed Statement of Changes in Stockholders' Equity (Parenthetical) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
ATM [Member]
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	$ 141,322
Private Placement [Member]
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs		$ 1,680,844

Condensed Statements of Cash Flows - USD ($)	1 Months Ended	3 Months Ended
Condensed Statements of Cash Flows - USD ($)	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Cash flows from operating activities:
Net loss		$ (8,597,736)		$ (11,019,468)
Adjustments to reconcile net loss to Net cash used in operating activities:
Depreciation and amortization		121,699		235,368
Stock based compensation		2,276,299		3,171,392
Changes in operating lease right-of-use assets		188,445		127,293
Bad debt expense		33,000
Changes in operating assets and liabilities:
Accounts receivable		(29,029)		(22,100)
Prepaid expenses and other current assets		98,212		147,413
Accounts payable		(633,268)		(6,079)
Accrued expenses		(628,052)		80,170
Operating lease liabilities		(169,681)		(83,166)
Net cash used in operating activities		(7,340,111)		(7,369,177)
Cash flows from investing activities:
Purchases of property and equipment				(161,249)
Net cash used in investing activities				(161,249)
Cash flows from financing activities:
Net proceeds from the sales of common stock	$ 23,319,156	5,506,880	$ 4,557,693	23,319,156
Proceeds from the exercise of stock options				400,103
Proceeds from contributions to employee stock purchase plan		113,059		173,167
Net cash provided by financing activities		5,619,939		23,553,060
Net (decrease) increase in cash and cash equivalents		(1,720,172)		16,022,634
Cash and cash equivalents - beginning		21,684,089		20,106,485
Cash and cash equivalents - ending	$ 36,129,119	19,963,917	$ 21,684,089	36,129,119
Restricted Stock Units (RSUs) [Member]
Cash flows from financing activities:
Shares repurchased for tax withholdings on vesting				(10,207)
Supplemental disclosure of non-cash financing activities:
Common stock issued		$ 4		4
Performance Shares [Member]
Cash flows from financing activities:
Shares repurchased for tax withholdings on vesting				$ (329,159)

Business Organization, Nature of Operations

3 Months Ended

Mar. 31, 2020

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® technology, consisting of proprietary semiconductor chipsets, software, hardware designs and antennas, that enables radio frequency (“RF”) based charging for electronic devices, providing wire-free contact and non-contact charging solutions, with the potential to enable charging with mobility. The Company believes its proprietary WattUp technology can be utilized in consumer electronics such as wearables, hearing aids, earbuds, Bluetooth headsets, Internet of Things (“IoT”) devices, smartphones, tablets, e-book readers, keyboards, mice, remote controls, rechargeable lights, cylindrical batteries, medical devices and other devices with charging requirements that would otherwise require battery replacement or wired power connection.

Liquidity and Management Plans

3 Months Ended

Mar. 31, 2020

Liquidity And Management Plan Disclosure [Abstract]

Liquidity and Management Plans

Note 2 – Liquidity and Management Plans

During the three months ended March 31, 2020 and 2019, the Company recorded revenue of $61,475 and $66,500, respectively. During the three months ended March 31, 2020 and 2019, the Company recorded net losses of $8,597,736 and $11,019,468, respectively. Net cash used in operating activities was $7,340,111 and $7,369,177 for the three months ended March 31, 2020 and 2019, respectively. The Company is currently meeting its liquidity requirements through the proceeds of securities offerings that raised net proceeds of $23,319,156 in March 2019, $4,557,693 during the fourth quarter 2019 and $5,506,880 during the first quarter 2020, along with payments received under product development projects.

As of March 31, 2020, the Company had cash on hand of $19,963,917. The Company expects that cash on hand as of March 31, 2020, together with anticipated revenues and potential financing will be sufficient to fund the Company’s operations into May 2021.

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, competition and global market fluctuations.

In March 2020, the World Health Organization declared the outbreak of a novel coronavirus (COVID-19) as a pandemic which continues to spread throughout the United States and the world. The Company is monitoring the outbreak of COVID-19 and the related business and travel restrictions and changes to behavior intended to reduce its spread, and its impact on operations, financial position, cash flows, inventory, supply chains, purchasing trends, customer payments, and the industry in general, in addition to the impact on its employees. Due to the rapid development and fluidity of this situation, the magnitude and duration of the pandemic and its impact on the Company's operations and liquidity is uncertain as of the date of this report. While there could ultimately be a material impact on operations and liquidity of the Company, at the time of issuance, the impact could not be determined.

Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2020

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 (“US GAAP”), and pursuant to the accounting and disclosure rules and regulations of the U.S. Securities and Exchange Commission (“SEC”).

These unaudited condensed interim financial statements should be read in conjunction with the audited financial statements and notes thereto for the fiscal year ended December 31, 2019 included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2019, filed with the SEC on March 13, 2020. The accounting policies used in preparing these unaudited condensed interim financial statements are consistent with those described in the Company’s December 31, 2019 audited financial statements.

Note 3 – Summary of Significant Accounting Policies, continued

Use of Estimates

The preparation of financial statements in conformity with US 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 instruments, recognition of revenue, the useful lives of long-lived assets, and income tax expense. 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

On January 1, 2018, the Company adopted Accounting Standards Update No. 2014-09, "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 a customer.

Identify the performance obligations in the contract.

Determine the transaction price of the contract.

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

Recognize revenue when the performance obligations are met or delivered.

The Company’s revenue currently consists of product development projects revenue and royalty revenue from Dialog. The Company also provides contract services for Dialog.

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 a point in time based on when 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.

The Company records royalty revenue from its manufacturing partner, Dialog, and such royalty revenue is recognized at a point in time based on shipments from Dialog to its customers.

The Company recognizes contract services revenue from Dialog over a period of time as the services are performed. The costs associated with this revenue are recognized as the services are performed and are included in cost of services revenue.

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 $4,575,303 and $6,800,678 for the three months ended March 31, 2020 and 2019, respectively.

Note 3 – Summary of Significant Accounting Policies, continued

Stock-Based Compensation

The Company accounts for equity instruments issued to employees, board members and contractors 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 common 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 March 31, 2020, 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 three months ended March 31, 2020 or 2019. 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 7,206,004 and 7,601,654 for the three months ended March 31, 2020 and 2019, respectively because their inclusion would be anti-dilutive.

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 Three Months Ended March 31,
	2020		2019
Warrant issued to private investors		3,938,802		4,702,354
Options to purchase common stock		550,985		576,293
RSUs		2,048,540		2,323,007
PSUs		667,677		–
Total potentially dilutive securities		7,206,004		7,601,654

Note 3 – Summary of Significant Accounting Policies, continued

Leases

As of January 1, 2019, 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 later of the adoption date, January 1, 2019, or 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 4 – Commitments and Contingencies, Operating Leases for further discussion of the Company’s operating leases.

Recent Accounting Pronouncements

In July 2019, the FASB issued ASU No. 2019-07, “Codification Updates to SEC Sections.” ASU 2019-07 updates the SEC portion of the FASB’s codification literature to reflect the changes the SEC made to simplify disclosures. It is effective immediately. The Company adopted ASU 2019-07 and its adoption had no material impact on its financial statements.

In December 2019, the FASB issued ASU No. 2019-12, “Income Taxes (Topic 740),” Simplifying the Accounting for Income Taxes. ASU 2019-12 removes certain exceptions under Topic 740 and improves consistent application by clarifying and amending existing guidance. This standard is effective for annual reporting periods beginning after December 15, 2020. The Company does not believe adoption of this standard will have a material impact on its financial statements.

Management’s Evaluation of Subsequent Events

The Company evaluates events that have occurred after the balance sheet date of March 31, 2020, through the date which the financial statements are issued.

Commitments and Contingencies

3 Months Ended

Mar. 31, 2020

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

Note 4 – Commitments and Contingencies

Operating Leases

San Jose Lease

On September 10, 2014, the Company entered into a lease agreement with Balzer Family Investments, L.P. (the “Landlord”) related to space located at Northpointe Business Center, 3590 North First Street, San Jose, California. The initial term of the lease was 60 months, with initial monthly base rent of $36,720 and the lease was subject to certain annual escalations as defined in the agreement. On March 13, 2019, the Company amended its lease agreement with the Landlord which combined both the first-floor space and the second-floor space for the final three months of the original lease term for the second floor, which expired on September 30, 2019. Effective July 1, 2019 through September 30, 2019, the new monthly rent payment was $48,372.

On February 26, 2015, the Company entered into a sub-lease agreement for space in its San Jose location on the first floor and was amended on August 25, 2015 to include additional space. The sub-lease agreement had a term which expired on June 30, 2019.

On July 1, 2019, the Company signed a new lease agreement for the lease of its office space at its corporate headquarters in San Jose, California for an additional three years. The lease agreement includes space on the first floor of the building that had been previously subleased. Upon expiration of the original lease on September 30, 2019, the new monthly lease payment starting October 1, 2019 was $52,970 and is subject to annual escalations up to a maximum monthly lease payment of $64,941.

Note 4 – Commitments and Contingencies, continued

Operating Leases, continued

Costa Mesa Lease

On May 31, 2017, the Company renewed a lease agreement for the Company’s space in Costa Mesa, California. The agreement had a term that expired on September 30, 2019 with initial monthly rent of $9,040 and was subject to certain annual escalations as defined in the agreement.

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 and is subject to an annual escalation up to a maximum monthly lease payment of $10,200.

Operating Lease Commitments

In February 2016, the FASB issued its final standard on lease accounting, ASU No. 2016-02, “Leases (Topic 842),” which superseded Topic 840, “Leases,” which was further modified in ASU No. 2018-10, “Codification Improvements” to clarify the implementation guidance. The new accounting standard was effective for the Company beginning on January 1, 2019 and required the recognition on the balance sheet of right-of-use assets and lease liabilities. The Company elected the optional transition method and adopted the new guidance on January 1, 2019 on a modified retrospective basis with no restatement of prior period amounts. The Company’s adoption of the new standard resulted in the recognition of right-of-use assets of $414,426 and operating lease liabilities of $485,747, with no material cumulative effect adjustment to equity as of the date of adoption. The Company anticipates having future total lease payments of $2,049,918 during the period from the second quarter of 2020 to the third quarter of 2022. As of March 31, 2020, the company has total operating lease right-of-use assets of $1,869,131, current portion operating lease liabilities of $762,822 and long-term portion of operating lease liabilities of $1,191,981. The weighted average remaining lease term is 2.4 years as of March 31, 2020.

A reconciliation of undiscounted cash flows to lease liabilities recognized as of March 31, 2020 is as follows:

	Amount
	(unaudited)
2020		602,250
2021		863,199
2022		584,469
Total future lease payments		2,049,918
Present value discount (4% weighted average)		(95,115	)
Total operating lease liabilities		1,954,803

Hosted Design Solution Agreement

On June 25, 2015, the Company entered into a three-year agreement to license electronic design automation software in a hosted environment. Pursuant to the agreement, under which services began July 2015, the Company is required to remit quarterly payments in the amount of approximately $101,000 with the last payment due March 30, 2018. On December 18, 2015, the agreement was amended to redefine the hardware and software configuration and the quarterly payments increased to approximately $198,000. In July 2018, the Company renewed agreement for an additional three years, and the Company is required to remit quarterly payments of approximately $218,000, with the last payment due in March 2021.

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.

Note 4 – Commitments and Contingencies, continued

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, and 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 three months ended March 31, 2020, the Company accrued $284,591 in expense under the Bonus Plan, which will be paid during the second quarter of 2020. During the three months ended March 31, 2019, the Company accrued $314,513 in expense, which was paid during the second quarter of 2019.

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 (“Executive”).

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.

Amended Employee 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.

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

Strategic Alliance Agreement

In November 2016, the Company and Dialog Semiconductor plc (“Dialog”), a related party (see Note 7—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 and will automatically renew annually thereafter unless terminated by either party upon 180 days’ prior written notice. The Company may 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 may terminate the Alliance Agreement if sales of Licensed Products do not meet specified targets. The Company Exclusivity Requirement will terminate upon the earlier of January 1, 2021 or the occurrence of certain events relating to the Company’s pre-existing exclusivity obligations.

Stockholders' Equity

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Stockholders' Equity

Note 5 – 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 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 August 9, 2018, the Company filed a shelf registration statement on Form S-3, which became effective on August 17, 2018. 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 $75,000,000. Pursuant to this registration statement, in March 2019 the Company raised $23,319,156 (net of $1,680,844 in issuance costs) from an offering of shares of its common stock and warrants to purchase 1,666,666 shares of common stock at an exercise price of $10.00 per share. The Company also raised $4,557,693 (net of $339,081 in issuance costs) and $5,506,880 (net of $141,322 in issuance costs), pursuant to this shelf registration statement, in an “at-the-market” equity offering during the fourth quarter of 2019 and the first quarter of 2020, respectively.

Common Stock Outstanding

In August 2019, an aggregate of 38,666 shares of common stock were returned to the Company and retired in connection with the rescission of restricted stock unit agreements.

Stock Based Compensation

3 Months Ended

Mar. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Based Compensation

Note 6 – Stock-Based Compensation

Equity Incentive Plans

2013 Equity Incentive Plan

Effective on May 16, 2018, 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 1,600,000 shares, bringing to 6,085,967 the total number of shares approved for issuance under that plan.

As of March 31, 2020, 649,695 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 16, 2018, 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 250,000 shares, bringing to 850,000 the total number of shares approved for issuance under that plan.

As of March 31, 2020, 227,825 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 May 16, 2018, 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 1,400,000 shares, bringing to 2,710,104 the total number of shares approved for issuance under that plan.

As of March 31, 2020, 764,274 shares of common stock remain eligible to be issued through equity-based instruments under the 2015 Performance Share Unit Plan.

Note 6 – Stock-Based Compensation, continued

Equity Incentive Plans, continued

2017 Equity Inducement Plan

On December 28, 2017, the Board approved the 2017 Equity Inducement Plan. Under the 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.

As of March 31, 2020, 298,404 shares of common stock remain available to be issued through equity-based instruments under the 2017 Equity Inducement 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 the approval by the stockholders. On May 21, 2015, the Company’s stockholders approved the ESPP. 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. No more than 7,500 shares may be purchased by an employee under the ESPP during an offering period. 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.

As of March 31, 2020, 165,750 shares of common stock remain eligible to be issued under the ESPP. As of March 31, 2020, employees have contributed $113,509 through payroll withholdings to the ESPP for the current offering period. Shares will be deemed delivered on June 30, 2020 for the current offering period.

Stock Option Activity

The following is a summary of the Company’s stock option activity during the three months ended March 31, 2020:

Number of

Options

Weighted

Average

Exercise

Price

Weighted

Average

Remaining

Life In

Years

Intrinsic

Value

Outstanding at January 1, 2020

550,985

5.67

4.3

2,538

Granted

–

Exercised

–

Forfeited

–

Outstanding at March 31, 2020

550,985

5.67

4.3

–

Exercisable at January 1, 2020

550,985

5.67

4.3

2,538

Vested

–

Exercised

–

Forfeited

–

Exercisable at March 31, 2020

550,985

5.67

4.3

–

As of March 31, 2020, the unamortized value of options was $0.

Note 6 – Stock-Based Compensation, continued

Restricted Stock Units (“RSUs”)

During the three months ended March 31, 2020, the Compensation Committee granted various employees RSUs covering 645,031 shares of common stock under the 2013 Equity Incentive Plan. The awards vest over terms ranging from two to four years.

During the three months ended March 31, 2020, the Compensation Committee granted employees RSUs covering 20,000 shares of common stock under the 2017 Equity Inducement Plan. The awards vest over four years beginning on the anniversary of the grant date.

As of March 31, 2020, the unamortized value of the RSUs was $10,274,477. The unamortized amount will be expensed over a weighted average period of 1.5 years. A summary of the activity related to RSUs for the three months ended March 31, 2020 is presented below:

	Total			Weighted Average Grant Date Fair Value
Outstanding at January 1, 2020		1,821,852		$	10.05
RSUs granted		665,031		$	1.27
RSUs forfeited		(41,784	)	$	2.09
RSUs vested		(396,559	)	$	11.62
Outstanding at March 31, 2020		2,048,540		$	6.93

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, market capitalization or market share price of the common stock.

Amortization for all PSU awards was $(88,348) and $0 for the three months ended March 31, 2020 and 2019, respectively.

A summary of the activity related to PSUs for the three months ended March 31, 2020 is presented below:

	Total			Weighted Average Grant Date Fair Value
Outstanding at January 1, 2020		428,000		$	2.09
PSUs granted		267,677			1.27
PSUs forfeited		(28,000	)		6.38
PSUs vested		–			–
Outstanding at March 31, 2020		667,677			1.76

Employee Stock Purchase Plan (“ESPP”)

The current offering period under the ESPP started on January 1, 2020 and will conclude on June 30, 2020. During the year ended December 31, 2019, there were two offering periods for the ESPP. The first offering period started on January 1, 2019 and concluded on June 30, 2019. The second offering period started on July 1, 2019 and concluded on December 31, 2019.

The weighted-average grant-date fair value of the purchase option for each designated share purchased under this plan was approximately $0.57 and $2.43 for the three months ended March 31, 2020 and 2019, 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 compensation expense for the plan of $42,827 and $87,825 for the three months ended March 31, 2020 and 2019, respectively.

Note 6 – Stock-Based Compensation, continued

Employee Stock Purchase Plan (“ESPP”), continued

The Company estimated the fair value of ESPP purchase options granted during the three months ended March 31, 2020 and 2019 using the Black-Scholes option pricing model. The fair values of stock options granted were estimated using the following assumptions:

	Three Months Ended March 31, 2020			Three Months Ended March 31, 2019
Stock price	$	1.77		$	5.79
Dividend yield		0	%		0	%
Expected volatility		61	%		96	%
Risk-free interest rate		1.57	%		2.51	%
Expected life	6 months			6 months

Stock-Based Compensation Expense

The following tables summarize total stock-based compensation costs recognized for the three months ended March 31, 2020 and 2019:

	Three Months Ended March 31,
	2020			2019
RSUs		2,321,820		$	3,083,567
PSUs		(88,348	)		–
ESPP		42,827			87,825
Total	$	2,276,299		$	3,171,392

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

	Three Months Ended March 31,
	2020		2019
Research and development	$	1,100,978	$	1,656,553
Sales and marketing		364,458		377,048
General and administrative		810,863		1,137,791
Total	$	2,276,299	$	3,171,392

Related Party Transactions

3 Months Ended

Mar. 31, 2020

Related Party Transactions

Note 7 – Related Party Transactions

In November 2016, the Company and Dialog entered into an alliance agreement for the manufacture, distribution and commercialization of products incorporating the Company’s wire-free charging technology (See Note 4 – 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 March 31, 2020, a total of 654,013 of the warrants remain outstanding. As of March 31, 2020, Dialog owns approximately 4.6% of the Company’s outstanding common shares and could potentially own approximately 6.2% of the Company’s outstanding common shares if it exercised all of its warrants for common shares. The Company recorded $0 and $7,100 in royalty revenue pursuant to the Strategic Alliance Agreement for the three months ended March 31, 2020 and 2019, respectively. Additionally, the Company recorded $40,625 and $0 in contract services revenue performed for Dialog during the three months ended March 31, 2020 and 2019, respectively. The Company recorded $39,544 and $0 in cost of services revenue associated with the contract services performed for Dialog during the three months ended March 31, 2020 and 2019, respectively.

Customer Concentrations

3 Months Ended

Mar. 31, 2020

Risks And Uncertainties [Abstract]

Customer Concentrations

Note 8 – Customer Concentrations

Two customers accounted for approximately 82% of the Company’s revenue for the three months ended March 31, 2020 and four customers accounted for approximately 98% of the Company’s revenue for the three months ended March 31, 2019. Two customers accounted for approximately 90% of the accounts receivable balance, one of which is Dialog, a related party, as of March 31, 2020. The accounts receivable balance for Dialog was $43,322 as of March 31, 2020. Four customers accounted for nearly 100% of the accounts receivable balance as of December 31, 2019.

Subsequent Events

3 Months Ended

Mar. 31, 2020

Subsequent Events [Abstract]

Subsequent Events

Note 9 – Subsequent Event

During April 2020, the Company raised net proceeds of $9,216,621 through an “at-the-market” (ATM) offering, pursuant to the shelf registration statement on Form S-3 filed on August 9, 2018 disclosed in Note 5 – Stockholders’ Equity, Financing.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Basis of Presentation

Use of Estimates

Cash and Cash Equivalents

Revenue Recognition

On January 1, 2018, the Company adopted Accounting Standards Update No. 2014-09, "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 a customer.

Identify the performance obligations in the contract.

Determine the transaction price of the contract.

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

Recognize revenue when the performance obligations are met or delivered.

The Company’s revenue currently consists of product development projects revenue and royalty revenue from Dialog. The Company also provides contract services for Dialog.

The Company records royalty revenue from its manufacturing partner, Dialog, and such royalty revenue is recognized at a point in time based on shipments from Dialog to its customers.

Research and Development

Stock-Based Compensation

Income Taxes

Net Loss Per Common Share

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 Three Months Ended March 31,
	2020		2019
Warrant issued to private investors		3,938,802		4,702,354
Options to purchase common stock		550,985		576,293
RSUs		2,048,540		2,323,007
PSUs		667,677		–
Total potentially dilutive securities		7,206,004		7,601,654

Leases

Recent Accounting Pronouncements

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 March 31, 2020, through the date which the financial statements are issued.

Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

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 Three Months Ended March 31,
	2020		2019
Warrant issued to private investors		3,938,802		4,702,354
Options to purchase common stock		550,985		576,293
RSUs		2,048,540		2,323,007
PSUs		667,677		–
Total potentially dilutive securities		7,206,004		7,601,654

Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2020

Commitments And Contingencies Disclosure [Abstract]

Schedule of Reconciliation of Undiscounted Cash Flows to Lease Liabilities Recognized

A reconciliation of undiscounted cash flows to lease liabilities recognized as of March 31, 2020 is as follows:

	Amount
	(unaudited)
2020		602,250
2021		863,199
2022		584,469
Total future lease payments		2,049,918
Present value discount (4% weighted average)		(95,115	)
Total operating lease liabilities		1,954,803

Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

The following is a summary of the Company’s stock option activity during the three months ended March 31, 2020:

Number of

Options

Weighted

Average

Exercise

Price

Weighted

Average

Remaining

Life In

Years

Intrinsic

Value

Outstanding at January 1, 2020

550,985

5.67

4.3

2,538

Granted

–

Exercised

–

Forfeited

–

Outstanding at March 31, 2020

550,985

5.67

4.3

–

Exercisable at January 1, 2020

550,985

5.67

4.3

2,538

Vested

–

Exercised

–

Forfeited

–

Exercisable at March 31, 2020

550,985

5.67

4.3

–

Schedule of Restricted Stock Units Activity

A summary of the activity related to RSUs for the three months ended March 31, 2020 is presented below:

	Total			Weighted Average Grant Date Fair Value
Outstanding at January 1, 2020		1,821,852		$	10.05
RSUs granted		665,031		$	1.27
RSUs forfeited		(41,784	)	$	2.09
RSUs vested		(396,559	)	$	11.62
Outstanding at March 31, 2020		2,048,540		$	6.93

Summary of Activity Related to PSUs

A summary of the activity related to PSUs for the three months ended March 31, 2020 is presented below:

	Total			Weighted Average Grant Date Fair Value
Outstanding at January 1, 2020		428,000		$	2.09
PSUs granted		267,677			1.27
PSUs forfeited		(28,000	)		6.38
PSUs vested		–			–
Outstanding at March 31, 2020		667,677			1.76

Summary of Fair Values of Stock Options Granted

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

	Three Months Ended March 31, 2020			Three Months Ended March 31, 2019
Stock price	$	1.77		$	5.79
Dividend yield		0	%		0	%
Expected volatility		61	%		96	%
Risk-free interest rate		1.57	%		2.51	%
Expected life	6 months			6 months

Summary of Stock-based Compensation Costs Recognized

The following tables summarize total stock-based compensation costs recognized for the three months ended March 31, 2020 and 2019:

	Three Months Ended March 31,
	2020			2019
RSUs		2,321,820		$	3,083,567
PSUs		(88,348	)		–
ESPP		42,827			87,825
Total	$	2,276,299		$	3,171,392

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:

	Three Months Ended March 31,
	2020		2019
Research and development	$	1,100,978	$	1,656,553
Sales and marketing		364,458		377,048
General and administrative		810,863		1,137,791
Total	$	2,276,299	$	3,171,392

Liquidity and Management Plans - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Liquidity And Management Plans [Line Items]
Engineering product development		$ 61,475		$ 66,500
Net loss		(8,597,736)		(11,019,468)
Net cash provided by (used in) operating activities		(7,340,111)		(7,369,177)
Proceeds of securities offerings	$ 23,319,156	5,506,880	$ 4,557,693	23,319,156
Cash and cash equivalents, at carrying value, total		19,963,917	$ 21,684,089
Technology Service [Member]
Liquidity And Management Plans [Line Items]
Engineering product development		$ 61,475		$ 66,500

- Definition

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

+ References + Details

Significant Accounting Policies - Additional Information (Detail) - USD ($)		3 Months Ended
	Apr. 30, 2015	Mar. 31, 2020	Mar. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Research and development expense, total		$ 4,575,303	$ 6,800,678
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		7,206,004	7,601,654
Employee Stock Purchase Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Common stock purchase price discount percentage	85.00%	15.00%

Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Total potentially dilutive securities	7,206,004	7,601,654
Warrant Issued to Private Investors [Member]
Summary Of Significant Accounting Policies [Line Items]
Total potentially dilutive securities	3,938,802	4,702,354
Employee Stock Option [Member]
Summary Of Significant Accounting Policies [Line Items]
Total potentially dilutive securities	550,985	576,293
Restricted Stock Units (RSUs) [Member]
Summary Of Significant Accounting Policies [Line Items]
Total potentially dilutive securities	2,048,540	2,323,007
Performance Share Units [Member]
Summary Of Significant Accounting Policies [Line Items]
Total potentially dilutive securities	667,677

Commitments and Contingencies - Operating Leases - Additional Information (Detail) - USD ($)					1 Months Ended	3 Months Ended
	Mar. 13, 2019	May 31, 2017	Aug. 25, 2015	Sep. 10, 2014	Oct. 31, 2019	Sep. 30, 2019	Mar. 31, 2020	Dec. 31, 2019	Jul. 15, 2019	Jul. 01, 2019	Jan. 01, 2019
Commitments And Contingencies [Line Items]
Operating lease right-of-use assets							$ 1,869,131	$ 2,057,576
Operating lease liabilities							762,822	722,291
Total operating lease payments							2,049,918
Long-term portion of operating lease liabilities							1,191,981	$ 1,402,193
ASU No. 2016-02 [Member]
Commitments And Contingencies [Line Items]
Operating lease right-of-use assets							1,869,131				$ 414,426
Operating lease liabilities							762,822				$ 485,747
Total operating lease payments							2,049,918
Long-term portion of operating lease liabilities							$ 1,191,981
Weighted average remaining lease term							2 years 4 months 24 days
San Jose, California [Member]
Commitments And Contingencies [Line Items]
Operating leases, rent expense					$ 52,970
Lease expiration date			Jun. 30, 2019
Operating lease, renewal term										3 years
San Jose, California [Member] \| Maximum [Member]
Commitments And Contingencies [Line Items]
Maximum monthly lease payment					64,941
Costa Mesa, California [Member]
Commitments And Contingencies [Line Items]
Operating leases, rent expense		$ 9,040			9,773
Lease expiration date		Sep. 30, 2019
Operating lease, renewal term									2 years
Costa Mesa, California [Member] \| Maximum [Member]
Commitments And Contingencies [Line Items]
Maximum monthly lease payment					$ 10,200
Balzer Family Investments Lp [Member] \| San Jose, California [Member]
Commitments And Contingencies [Line Items]
Operating leases expiration period				60 months
Operating leases, rent expense				$ 36,720		$ 48,372
Lease expiration date	Sep. 30, 2019

Commitments and Contingencies - Schedule of Reconciliation of Undiscounted Cash Flows to Lease Liabilities Recognized (Detail)	Mar. 31, 2020 USD ($)
Operating Leases Future Minimum Payments Due [Abstract]
2020	$ 602,250
2021	863,199
2022	584,469
Total future lease payments	2,049,918
Present value discount (4% weighted average)	(95,115)
Total operating lease liabilities	$ 1,954,803

Commitments and Contingencies - Schedule of Reconciliation of Undiscounted Cash Flows to Lease Liabilities Recognized (Parenthetical) (Detail)	Mar. 31, 2020
Operating Leases Future Minimum Payments Due [Abstract]
Weighted average discount rate percent	4.00%

Commitments and Contingencies - Hosted Design Solution Agreement - Additional Information (Detail) - Hosted Design Solution Agreement [Member] - USD ($)			1 Months Ended
	Dec. 18, 2015	Jun. 25, 2015	Jul. 31, 2018	Jul. 31, 2015
Commitments And Contingencies [Line Items]
Initial term of agreement		3 years
Quarterly payments for service agreement	$ 198,000		$ 218,000	$ 101,000
Additional term of agreement			3 years

Commitments and Contingencies - MBO Bonus Plan - Additional Information (Detail) - USD ($)	Mar. 31, 2020	Mar. 31, 2019
Accrued Expenses [Member] \| Executive Officers [Member]
Commitments And Contingencies [Line Items]
Bonus accrued but not yet paid	$ 284,591	$ 314,513

Commitments and Contingencies - Employee Agreement - Stephen Rizzone - Additional Information (Detail) - Mr. Rizzone [Member] - USD ($)		3 Months Ended
	Jan. 01, 2015	Mar. 31, 2020
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%

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)		1 Months Ended		3 Months Ended
Stockholders' Equity - Additional Information (Detail)	Aug. 17, 2018 USD ($)	Aug. 31, 2019 shares	Mar. 31, 2019 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) Vote	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($) $ / shares shares
Class of Stock [Line Items]
Number of common stock voting entitlement per share \| Vote				1
Proceeds from private offering of shares of common stock and warrants			$ 23,319,156			$ 23,319,156
Net of issuance costs from offering of shares			$ 1,680,844	$ 141,322	$ 339,081
Class of warrant or right, number of securities called by warrants or rights \| shares			1,666,666			1,666,666
Class of warrant or right, exercise price of warrants or rights \| $ / shares			$ 10.00			$ 10.00
Proceeds from at the market offering of shares of common stock and warrants				5,506,880	$ 4,557,693
Common Stock [Member]
Class of Stock [Line Items]
Proceeds from private offering of shares of common stock and warrants						$ 33
Proceeds from at the market offering of shares of common stock and warrants				$ 44
RSU Rescission Agreements [Member] \| Common Stock [Member]
Class of Stock [Line Items]
Number of shares returned \| shares		38,666
Consummation of Offering Under Shelf Registration [Member]
Class of Stock [Line Items]
Proceeds from shelf registration debt or equity securities	$ 75,000,000

Stock Based Compensation - Equity Incentive Plan - Additional Information (Detail) - USD ($)		3 Months Ended
	Apr. 30, 2015	Mar. 31, 2020	May 16, 2018	Dec. 28, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee contribution through payroll withholdings		$ 113,509
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
Common stock remain eligible to be issued		165,750
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%
Maximum number of shares permitted to purchase	7,500
Offering 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 the approval by the stockholders. On May 21, 2015, the Company’s stockholders approved the ESPP. 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. No more than 7,500 shares may be purchased by an employee under the ESPP during an offering period. 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.
2013 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized for issuance			6,085,967
Common stock, capital shares reserved for future issuance			1,600,000
Common stock remain eligible to be issued		649,695
Non-Employee Equity Compensation Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized for issuance			850,000
Common stock, capital shares reserved for future issuance			250,000
Common stock remain eligible to be issued		227,825
2015 Performance Share Unit Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized for issuance			2,710,104
Common stock, capital shares reserved for future issuance			1,400,000
Common stock remain eligible to be issued		764,274
2017 Equity Inducement Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available to be issued		298,404
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 Stock Option Activity (Detail) - Employee Stock Option [Member] - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding	550,985
Number of Options, Granted	0
Number of Options, Exercised	0
Number of Options, Forfeited	0
Number of Options, Outstanding	550,985	550,985
Number of Options, Exercisable	550,985
Number of Options, Vested	0
Number of Options, Exercised	0
Number of Options, Forfeited	0
Number of Options, Exercisable	550,985	550,985
Weighted Average Exercise Price, Outstanding	$ 5.67
Weighted Average Exercise Price, Granted	0
Weighted Average Exercise Price, Exercised	0
Weighted Average Exercise Price, Forfeited	0
Weighted Average Exercise Price, Outstanding	5.67	$ 5.67
Weighted Average Exercise Price, Exercisable	5.67
Weighted Average Exercise Price, Vested	0
Weighted Average Exercise Price, Exercised	0
Weighted Average Exercise Price, Forfeited	0
Weighted Average Exercise Price, Exercisable	$ 5.67	$ 5.67
Weighted Average Remaining Life In Years, Outstanding	4 years 3 months 18 days	4 years 3 months 18 days
Weighted Average Remaining Life In Years, Exercisable	4 years 3 months 18 days	4 years 3 months 18 days
Intrinsic Value, Outstanding		$ 2,538
Intrinsic Value, Exercisable		$ 2,538

Stock Based Compensation - Stock Option Award Activity - Additional Information (Detail)	Mar. 31, 2020 USD ($)
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	$ 0

Stock Based Compensation - Restricted Stock Units - Additional Information (Detail) - Restricted Stock Units (RSUs) [Member]	3 Months Ended
	Mar. 31, 2020 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 \| $	$ 10,274,477
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	1 year 6 months
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	645,031
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	20,000
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]	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding \| shares	1,821,852
RSUs granted \| shares	665,031
RSUs forfeited \| shares	(41,784)
RSUs vested \| shares	(396,559)
Number of Options, Outstanding \| shares	2,048,540
Weighted Average Grant Date Fair Value, Beginning Balance \| $ / shares	$ 10.05
Weighted Average Grant Date Fair Value, RSUs granted \| $ / shares	1.27
Weighted Average Grant Date Fair Value, RSUs forfeited \| $ / shares	2.09
Weighted Average Grant Date Fair Value, RSUs vested \| $ / shares	11.62
Weighted Average Grant Date Fair Value, Ending Balance \| $ / shares	$ 6.93

Stock Based Compensation - Performance Share Units - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ (88,348)	$ 0

Stock Based Compensation - Summary of Activity Related to PSUs (Detail) - Performance Shares [Member]	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding \| shares	428,000
PSUs granted \| shares	267,677
PSUs forfeited \| shares	(28,000)
PSUs / DSUs vested \| shares	0
Number of Options, Outstanding \| shares	667,677
Weighted Average Grant Date Fair Value, Beginning Balance \| $ / shares	$ 2.09
Weighted Average Grant Date Fair Value, PSUs granted \| $ / shares	1.27
Weighted Average Grant Date Fair Value, PSUs forfeited \| $ / shares	6.38
Weighted Average Grant Date Fair Value, PSUs vested \| $ / shares	0
Weighted Average Grant Date Fair Value, Ending Balance \| $ / shares	$ 1.76

Stock Based Compensation - Employee Stock Purchase Plan - Additional Information (Detail) - Employee Stock Purchase Plan [Member] - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
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	$ 0.57	$ 2.43
Percentage of proportionate value of call option of stock	85.00%
Percentage of proportionate value of put option of stock	15.00%
Allocated share-based compensation expense	$ 42,827	$ 87,825

Stock Based Compensation - Summary of Fair Values of Stock Options Granted (Detail) - Employee Stock Purchase Plan [Member] - Employee Stock Option [Member] - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price	$ 1.77	$ 5.79
Dividend yield	0.00%	0.00%
Expected volatility	61.00%	96.00%
Risk-free interest rate	1.57%	2.51%
Expected life	6 months	6 months

Stock Based Compensation -Summary of Stock-based Compensation Costs Recognized (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	$ 2,276,299	$ 3,171,392
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	2,321,820	3,083,567
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	(88,348)	0
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	$ 42,827	$ 87,825

Stock Based Compensation - Summary of Stock-based Compensation Reflected within Statements of Operations (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based Compensation, Total	$ 2,276,299	$ 3,171,392
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	1,100,978	1,656,553
Selling and Marketing Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	364,458	377,048
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	$ 810,863	$ 1,137,791

Related Party Transactions - Additional Information (Detail) - USD ($)	3 Months Ended		8 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Jun. 28, 2017
Related Party Transaction [Line Items]
Class of warrant or right, number of securities called by warrants or rights		1,666,666
Cost of services revenue	$ 39,544
Dialog Semiconductor Plc [Member]
Related Party Transaction [Line Items]
Equity method investment, ownership percentage	4.60%
Percentage of common shares potentially own outstanding shares	6.20%
Warrants outstanding	654,013
Contract Services [Member] \| Dialog Semiconductor Plc [Member]
Related Party Transaction [Line Items]
Revenue	$ 40,625	$ 0
Cost of services revenue	39,544	0
Strategic Alliance Agreement [Member] \| Royalty [Member]
Related Party Transaction [Line Items]
Revenue	$ 0	$ 7,100
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 Concentrations - Additional Information (Detail) - Customer Concentration Risk [Member]	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) Customer	Mar. 31, 2019 Customer	Dec. 31, 2019 Customer
Revenues [Member]
Concentration Risk [Line Items]
Number of customers	2	4
Concentration percentage	82.00%	98.00%
Accounts Receivable [Member]
Concentration Risk [Line Items]
Number of customers	2		4
Concentration percentage	90.00%		100.00%
Accounts Receivable [Member] \| Dialog Semiconductor Plc [Member]
Concentration Risk [Line Items]
Accounts receivable \| $	$ 43,322

Subsequent Event - Additional Information (Detail)	1 Months Ended
Subsequent Event - Additional Information (Detail)	Apr. 30, 2020 USD ($)
Subsequent Event [Member]
Subsequent Event [Line Items]
Proceeds from issuance of stock at the market offering	$ 9,216,621