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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Operating activities    
Net loss $ (4,586) $ (769)
Depreciation 113 110
Amortization of right-of-use finance leases 177 219
Amortization of imputed interest (321) (321)
Interest expense from PPP Loan 4
Gain on forgiveness of PPP Loan (1,417)
Amortization of right-of-use operating leases 495 421
Change in receivable reserves (140) 68
Proceeds from insurance receivable 95
Stock-based compensation 859 129
Changes in current operating assets and liabilities:    
Accounts receivable (1,253) (758)
Inventories (4,319) (1,097)
Prepaid expenses and other assets 167 247
Income taxes 24 401
Accounts payable and accrued liabilities 1,141 541
Deferred revenue 4,198 1,549
Principal repayments of operating leases (491) (413)
Net cash used in operating activities (3,936) (991)
Investing activities    
Additions to property and equipment (391) (156)
Net cash used in investing activities (391) (156)
Financing activities    
Net proceeds from the exercise of options for common stock 17
Dividend paid to shareholders (1,047)
Principal repayments of financing leases (179) (226)
Net cash used in financing activities (162) (1,273)
Decrease in cash and restricted cash (4,489) (2,420)
Cash, and restricted cash, beginning of year 11,699 7,567
Cash, and restricted cash, end of period 7,210 5,147
Non-cash investing and financing activities:    
Acquisition of right-of-use assets and lease liabilities $ 551 $ 1,418