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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Operating activities    
Net (loss) income $ (1,035) $ 742
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 122 130
Amortization of right-of-use financing leases 32 73
Amortization of right-of-use operating leases 179 169
Change in allowance for credit losses 49 13
Stock-based compensation 225 143
Other (14)
Changes in current operating assets and liabilities:    
Accounts receivable (2,235) 2,308
Inventories (2,011) (412)
Prepaid expenses and other assets 217 (57)
Income taxes 2
Accounts payable, accrued liabilities and other liabilities (296) (750)
Deferred revenue 2,989 (652)
Operating lease liabilities (186) (170)
Net cash (used in)/ provided by operating activities (1,950) 1,525
Investing activities    
Purchases of property and equipment (213) (194)
Net cash used in investing activities (213) (194)
Financing activities    
Net proceeds from issuance of common stock 4,841
Principal repayments of financing leases (33) (71)
Net cash provided by/ (used in) financing activities 4,808 (71)
Increase in cash 2,645 1,260
Cash, beginning of period 3,582 10,296
Cash, end of period 6,227 11,556
Supplemental cash flow information:    
Interest paid $ 9 $ 2