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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Operating activities    
Net loss $ (3,305) $ (335)
Depreciation 73 74
Amortization of right-of-use finance leases 124 156
Amortization of imputed interest (214) (214)
Interest expense from PPP Loan 4
Gain on forgiveness of PPP Loan (1,417)
Amortization of right-of-use operating leases 328 262
Change in receivable reserves (141) 43
Proceeds from insurance receivable 95
Stock-based compensation 716 71
Changes in current operating assets and liabilities:    
Accounts receivable (2,642) (1,423)
Inventories (4,857) (910)
Prepaid expenses and other assets (67) 118
Income taxes 27 403
Accounts payable and accrued liabilities 1,796 1,053
Deferred revenue 6,866 1,839
Principal repayments of operating leases (325) (252)
Net cash used in operating activities (1,621) (433)
Investing activities    
Additions to property and equipment (174) (62)
Net cash used in investing activities (174) (62)
Financing activities    
Net proceeds from the exercise of options for common stock 17
Principal repayments of financing leases (136) (163)
Net cash used in financing activities (119) (163)
Decrease in cash and restricted cash (1,914) (658)
Cash, and restricted cash, beginning of year 11,699 7,567
Cash, and restricted cash, end of period 9,785 6,909
Non-cash investing and financing activities:    
Acquisition of right-of-use assets and lease liabilities 551
Declared dividend unpaid $ 1,047