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
 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES    
Net loss $ (12,163) $ (31,774)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation 3,011 8,903
Issuance of common stock to consultants 247
Depreciation and amortization 360 184
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
Loss on disposal of equipment 52
Amortization of right of use assets 365
Changes in operating assets and liabilities:    
Prepaid and other assets 392 (479)
Accounts payable 367 (757)
Accrued expenses (165) 123
Accrued interest 72
Lease liability (268)
Net cash used in operating activities (8,049) (8,137)
CASH FLOWS FROM INVESTING ACTIVITIES    
Purchase of equipment (278) (392)
Purchase of patents (61) (1,706)
Net cash used in investing activities (339) (2,098)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from the issuance of common stock and warrants, net of fees 855 19,326
Proceeds from the issuance of common stock / At-the-market offering 732
Offering costs for the issuance of common stock / At-the-market offering (26)
Proceeds from issuance of Series D preferred stock and warrants, net of fees 1,039
Proceeds from the exercise of common stock warrants 180
Proceeds from PPP loan 233
Proceeds from exercise of stock options 186
Repayment of related party non interest bearing advance (25)
Net cash provided by financing activities 2,600 19,900
Net increase (decrease) increase in cash (5,788) 9,665
Cash — beginning of period 6,130 36
Cash — end of period 342 9,701
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
Issuance of common stock warrants in connection with consideration payable 86  
Unpaid equipment included in accounts payable 486
SUPPLEMENTAL CASH FLOW INFORMATION    
Cash paid for interest $ 3 $ 5