Quarterly report pursuant to Section 13 or 15(d)

Condensed Statements of Cash Flows (Unaudited)

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Condensed Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES    
Net loss $ (4,570) $ (20,672)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation 1,083 3,463
Issuance of common stock to consultants 3
Depreciation and amortization 107 76
(Gain) loss on extinguishment of debt 13,805
Loss on exchange of notes payable for common stock and warrants 6
Amortization of debt discount 458
Change in fair value of warrant liability 1,024
Change in fair value of derivative liability 51
Amortization of right of use assets 118
Loss on disposal of equipment 52
Changes in operating assets and liabilities:    
Prepaid and other assets (87) (112)
Account payable (32) (899)
Accrued expenses (208) (145)
Accrued interest 72
Lease liability (15)
Net cash used in operating activities (3,552) (2,870)
CASH FLOWS FROM INVESTING ACTIVITIES    
Purchase of equipment (58) (77)
Purchase of patents (7) (1,506)
Net cash used in investing activities (65) (1,583)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of common stock, net of fees 19,326
Proceeds from the exercise of common stock warrants 180
Proceeds from PPP loan 233
Repayment of related party non interest bearing advance (25)
Net cash provided by financing activities 19,714
Net (decrease) increase in cash (3,617) 15,261
Cash — beginning of period 6,130 36
Cash — end of period 2,513 15,297
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:    
Issuance of common stock warrants in connection with SLOC 223
Issuance of common stock and preferred stock in connection with conversion of notes 19,222
Repurchase beneficial conversion feature in connection with conversion of notes payable 6,647
Reclassification of warrant liabilities 3,566
Issuance of common stock warrants in connection with note exchange agreements 4,918
Unpaid equipment included in accounts payable 4
SUPPLEMENTAL CASH FLOW INFORMATION    
Cash paid for interest 3 2
Cash paid income taxes