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Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities:    
Net loss $ (47,387) $ (26,851)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 1,557 948
Amortization of debt discount and debt issuance costs 161 279
Non-cash interest expense 551 540
Deferred income taxes (306) 148
Non-cash lease expense 967 0
Long-lived assets impairment 397 0
Goodwill Impairment 5,506 0
Stock-based compensation 4,704 4,728
Other 36 0
Changes in assets and liabilities:    
Accounts receivable, net 3,577 (744)
Prepaid expenses and other current assets (505) 521
Other assets (47) (167)
Operating lease liabilities (854) 0
Accounts payable 901 (655)
Accrued and other current liabilities (1,402) 984
Net cash used in operating activities (32,144) (20,269)
Cash flows from investing activities:    
Purchases of property and equipment (4,318) (2,370)
Purchase of other assets 0 (50)
Net cash used in investing activities (4,318) (2,420)
Cash flows from financing activities:    
Proceeds from exercise of stock options 61 89
Payments of taxes withheld on vested restricted stock units (239) 0
Proceeds from common stock issued under Employee Stock Purchase Plan 385 390
Proceeds from exercise of common stock warrants 0 32
Principal payment on finance lease obligations (667) (525)
Principal payment on note payable obligations (29) 0
Proceeds from the issuance of common stock in public offering, gross 0 69,144
Net cash (used in) provided by financing activities (489) 64,683
Net change in cash, cash equivalents and restricted cash (36,951) 41,994
Cash, cash equivalents and restricted cash, beginning of year 99,542 57,548
Cash, cash equivalents and restricted cash, end of year 62,591 99,542
Supplemental disclosure of cash flow information:    
Cash paid for interest expense 1,732 1,815
Supplemental disclosure of non-cash items:    
Equipment purchased under finance lease obligations 741 1,111
Equipment purchased under notes payable obligations 807 0
Costs incurred, but not paid, in connection with capital expenditures 182 685
Deferred offering costs reclassified to equity 0 28
Public Offering    
Cash flows from financing activities:    
Payment of issuance costs related to public offering 0 (4,407)
Other Offering    
Cash flows from financing activities:    
Payment of issuance costs related to public offering $ 0 $ (40)