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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Cash flows provided by operating activities:    
Net loss $ (631,000) $ (13,000)
Depreciation and amortization 122,000 75,000
Impairment of software 51,000
Impairment of inventory 41,000 22,000
Non-cash lease expense 124,000 117,000
Stock-based compensation 80,000 75,000
Change in operating assets and liabilities:    
Decrease (increase) in accounts receivable 279,000 (268,000)
Increase in inventory (213,000) (403,000)
Increase in deferred cost of goods sold (181,000) (207,000)
Increase in other current assets and other assets (105,000) (172,000)
Increase in deferred revenue 778,000 839,000
Decrease in operating lease liability (130,000) (121,000)
(Decrease) increase in accounts payable, accrued expenses, other current liabilities and non-current liabilities (184,000) 188,000
Net cash provided by operating activities 31,000 132,000
Cash flows used in investing activities:    
Investments in Azure cloud hosting environment and other technology and software (292,000) (317,000)
Other capital investments (16,000) (7,000)
Net cash used in investing activities (308,000) (324,000)
Cash flows provided by (used in) financing activities:    
Short-term credit, net (149,000)
Stock option exercise proceeds 5,000
Net cash provided by (used in) financing activities 5,000 (149,000)
Net decrease in cash (272,000) (341,000)
Cash at the beginning of the year 1,722,000 2,063,000
Cash at the end of the year 1,450,000 1,722,000
Cash paid during the year for:    
Interest 2,000 6,000
Income taxes
Non-cash investing and financing activities:    
Accrued preferred dividends to former CEO of OmniMetrix (see Note 3) $ 4,000 $ 4,000