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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Operating activities:    
Net income $ 667 $ 653
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 311 335
Gain on sale of assets (5)
Stock-based compensation expense 11 32
Deferred tax expense 16 9
Bad debt expense / (recovery) 33 (33)
Changes in operating assets and liabilities:    
Accounts receivable (126)
Inventory (55) (308)
Prepaid expenses and other assets (697) (250)
Accounts payable 128 73
Accrued expenses and other current liabilities 738 235
Deferred revenue 853 563
Right of use assets and liabilities, net (11) (9)
Net cash provided by operating activities 1,868 1,295
Investing activities:    
Investment in BlueTrace (200)
Purchases of property, equipment and software development costs (91) (27)
Net cash used in investing activities (91) (227)
Financing activities:    
Repayments of finance lease obligations (7) (6)
Proceeds from stock option exercise 74 46
Private purchase of common shares (1,027)
Stock repurchase under Stock Buyback Plan (858) (2,066)
Net cash used in financing activities (1,818) (2,026)
Net change in cash (41) (958)
Cash at beginning of period 2,641 4,368
Cash at end of period $ 2,600 $ 3,410