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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows provided by operating activities:    
Net income $ 474 $ 68
Depreciation and amortization 30 28
Deferred tax expense 125
Decrease in the provision for credit loss (1) (7)
Impairment of inventory 9
Non-cash lease expense 32 32
Stock-based compensation 61 27
Change in operating assets and liabilities:    
(Increase) decrease in accounts receivable (126) 56
(Increase) decrease in inventory (484) 165
Decrease in deferred COGS 135 235
Decrease in other current assets and other assets 17 27
Decrease in state income tax receivable 10
Decrease in deferred revenue (278) (556)
Decrease in operating lease liability (37) (36)
Increase in state income tax payable 15
Increase (decrease) in accounts payable, accrued expenses, other current liabilities and non-current liabilities 298 (91)
Net cash provided by (used in) operating activities 271 (43)
Cash flows used in investing activities:    
Purchases of furniture and equipment (6)
Investments in technology (2)
Net cash used in investing activities (6) (2)
Cash flows provided by financing activities:    
Stock option exercise proceeds 13
Net cash provided by financing activities 13
Net increase (decrease) in cash 265 (32)
Cash at the beginning of the period 2,326 1,449
Cash at the end of the period 2,591 1,417
Cash paid during the year for:    
Interest 1
Income taxes 4 2
Non-cash investing and financing activities:    
Accrued preferred dividends to former CEO of OmniMetrix $ 1 $ 1