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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Cash flows used in operating activities:      
Net income (loss) $ 68,000 $ (84,000)  
Depreciation and amortization 28,000 38,000  
(Decrease) increase in the provision for credit loss (7,000) 2,000  
Impairment of inventory 9,000 3,000  
Non-cash lease expense 32,000 31,000  
Stock-based compensation 27,000 17,000  
Change in operating assets and liabilities:      
Decrease (increase) in accounts receivable 56,000 (176,000)  
Decrease (increase) in inventory 165,000 (18,000)  
Decrease in deferred COGS 235,000 37,000  
Decrease (increase) in other current assets and other assets 27,000 (20,000)  
(Decrease) increase in deferred revenue (556,000) 45,000  
Decrease in operating lease liability (36,000) (33,000)  
(Decrease) increase in accounts payable, accrued expenses, other current liabilities and non-current liabilities (91,000) 75,000  
Net cash used in operating activities (43,000) (83,000)  
Cash flows used in investing activities:      
Investments in technology (2,000) (26,000)  
Net cash used in investing activities (2,000) (26,000)  
Cash flows provided by financing activities:      
Stock option exercise proceeds 13,000  
Warrant exercise proceeds 5,000  
Net cash provided by financing activities 13,000 5,000  
Net decrease in cash (32,000) (104,000)  
Cash at the beginning of the period 1,449,000 1,450,000 $ 1,450,000
Cash at the end of the period 1,417,000 1,346,000 $ 1,449,000
Cash paid during the year for:      
Interest 1,000  
Income taxes 2,000  
Non-cash investing and financing activities:      
Accrued preferred dividends to former CEO of OmniMetrix $ 1,000 $ 1,000