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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Operating activities:    
Net income $ 121 $ 497
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 172 195
Stock-based compensation expense 15 51
Deferred tax benefit (3) (19)
Bad debt expense 13 5
Changes in operating assets and liabilities:    
Accounts receivable 94 (27)
Inventory (82) (48)
Prepaid expenses and other assets (25) (56)
Accounts payable 27 147
Accrued expenses and other current liabilities 164 613
Deferred revenue (22) (236)
Right of use assets and liabilities, net (1) (2)
Net cash provided by operating activities 473 1,120
Investing activities:    
Investment in BlueTrace (200)
Purchases of property, equipment and software development costs (7) (16)
Net cash used in investing activities (207) (16)
Financing activities:    
Repayments of finance lease obligations (4) (3)
Stock repurchase under Stock Buyback Plan (1,230) (422)
Net cash used in financing activities (1,234) (425)
Net change in cash (968) 679
Cash at beginning of period 4,368 5,414
Cash at end of period $ 3,400 $ 6,093