Quarterly report pursuant to Section 13 or 15(d)

Condensed Statements of Cash Flows

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Condensed Statements of Cash Flows - USD ($)
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Cash flows from operating activities:    
Net loss $ (7,152,718) $ (8,525,763)
Adjustments to reconcile net loss to Net cash used in operating activities:    
Depreciation and amortization 70,119 64,774
Stock based compensation 796,906 2,146,226
Changes in operating lease right-of-use assets 186,736 195,914
Changes in operating assets and liabilities:    
Accounts receivable 84,678 (80,925)
Inventory (68,480)  
Prepaid expenses and other current assets 443,216 (105,491)
Accounts payable (271,044) 353,928
Accrued severance expense (65,566)  
Accrued expenses (180,535) 179,999
Operating lease liabilities (203,010) (210,212)
Deferred revenue 2,727 5,000
Net cash used in operating activities (6,356,971) (5,976,550)
Cash flows from investing activities:    
Purchases of property and equipment (44,489) (111,727)
Net cash used in investing activities (44,489) (111,727)
Cash flows from financing activities:    
Proceeds from contributions to employee stock purchase plan 104,217 117,013
Net cash provided by financing activities 104,217 117,013
Net decrease in cash and cash equivalents (6,297,243) (5,971,264)
Cash and cash equivalents – beginning 49,071,414 50,729,661
Cash and cash equivalents – ending 42,774,171 44,758,397
Restricted Stock Units (RSUs) [Member]    
Supplemental disclosure of non-cash financing activities:    
Common stock issued $ 4 $ 6