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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Operating activities    
Net income (loss) $ 827 $ (4,586)
Adjustments to reconcile net income (loss) to net cash used in operating activities:    
Depreciation 370 113
Amortization of right-of-use financing leases 269 177
Amortization of imputed interest (321)
Amortization of right-of-use operating leases 514 495
Change in receivable reserves 80 (140)
Stock-based compensation 1,246 859
Other (15)
Changes in current operating assets and liabilities:    
Accounts receivable 1,805 (1,253)
Inventories 468 (4,319)
Prepaid expenses and other assets (2,990) 167
Income taxes (4) 24
Accounts payable and accrued liabilities 2,407 1,141
Deferred revenue (4,685) 4,198
Operating lease liabilities (520) (491)
Net cash used in operating activities (228) (3,936)
Investing activities    
Purchases of property and equipment (2,345) (391)
Net cash used in investing activities (2,345) (391)
Financing activities    
Net proceeds from the exercise of options for common stock 50 17
Net proceeds from issuance of common stock 177
Payment of deferred financing costs (73)
Principal repayments of financing leases (296) (179)
Net cash used in financing activities (142) (162)
Decrease in cash (2,715) (4,489)
Cash, beginning of period 10,296 11,699
Cash, end of period 7,581 7,210
Non-cash investing and financing activities:    
Acquisition of right-of-use assets and lease liabilities 551
Deferred financing costs included in accounts payable and accrued liabilities 122
Surrender and retirement of common stock $ 720