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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Cash flows provided by (used in) operating activities:    
Net income (loss) $ 42 $ (555)
Depreciation and amortization 115 83
Impairment of inventory 9 31
Impairment of software 51
Non-cash lease expense 96 93
Stock-based compensation 46 69
Change in operating assets and liabilities:    
Decrease (increase) in accounts receivable 14 (41)
Increase in inventory (129) (317)
Decrease (increase) in deferred COGS 162 (158)
Increase in other current assets and other assets (49) (62)
Increase (decrease) in accounts payable and accrued expenses 157 (91)
Increase in deferred revenue 40 660
Decrease in operating lease liability (104) (97)
(Decrease) increase in other current liabilities and non-current liabilities (33) 23
Net cash provided by (used in) operating activities 366 (311)
Cash flows used in investing activities:    
Investments in technology (70) (286)
Other capital investments (2) (6)
Net cash used in investing activities (72) (292)
Cash flows provided by financing activities:    
Stock option exercise proceeds 5
Warrant exercise proceeds 5
Net cash provided by financing activities 5 5
Net increase (decrease) in cash 299 (598)
Cash at the beginning of the year 1,450 1,722
Cash at the end of the period 1,749 1,124
Cash paid during the period for:    
Interest 2 1
Non-cash investing and financing activities:    
Accrued preferred dividends to former CEO of OmniMetrix $ 3 $ 3