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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Cash flows from operating activities:    
Net loss $ (17,805) $ (13,407)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 2,289 783
Stock-based compensation 4,357 3,461
Allowance for doubtful accounts 683  
Change in fair value of warrant liability   (113)
Amortization of debt discount   1,540
Accrued interest expense 4 661
Amortization of lease right-of-use assets 418 182
Change in operating lease liabilities (462) (177)
Other 199 26
Changes in assets and liabilities:    
Accounts receivable 117 (16)
Inventories (1,447) (756)
Tax credits and receivables 23 (434)
Prepaid expenses and other assets 190 212
Deferred cost of net revenue (600)  
Accounts payable (193) 925
Deferred revenue and other liabilities (1,192) 56
Net cash used in operating activities (13,419) (7,057)
Cash flows from investing activities:    
Purchases of property and equipment (577) (57)
Purchases of intangible assets (21) (95)
Proceeds from maturities of marketable securities 11,534  
Purchases of marketable securities (497)  
Net cash provided by (used in) investing activities 10,439 (152)
Cash flows from financing activities:    
Taxes paid to net share settle equity awards (61)  
Repayment of loans   (184)
Proceeds from exercise of stock options   31
Net proceeds from loan facility   1,262
Net proceeds from convertible debenture   5,545
Net cash provided by (used in) financing activities (61) 6,654
Net decrease in cash and cash equivalents 3,041 555
Cash and cash equivalents at beginning of period 5,893 1,712
Cash and cash equivalents at end of period 2,852 1,157
Supplemental disclosure:    
Recognition of right-of-use assets and lease liabilities 1,003  
Unrealized loss on available-for-sale securities $ 36  
Settlement of loan facility against tax receivables   1,093
Fair value of new warrants issued recognized as debt discount   $ 2,604