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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Statement of Cash Flows [Abstract]    
Net loss $ (2,825,000) $ (2,824,000)
Adjustments to reconcile net loss to net cash used in operating activities    
Stock-based compensation 784,000 562,000
Depreciation and amortization 283,000 403,000
Loss on asset disposal 18,000
Amortization of line of credit discount 6,000
Stock and options issued for services 11,000
Changes in assets and liabilities    
Accounts receivable (8,000) (695,000)
Other receivables 105,000 (59,000)
Inventories (286,000) (166,000)
Prepaid expenses and other assets 40,000 10,000
Accounts payable (399,000) 202,000
Accrued expenses 71,000 (402,000)
Net cash used in operating activities (2,229,000) (2,940,000)
Investing activities    
Purchase of property and equipment (53,000)
Net cash used in investing activities (53,000)
Financing activities    
Borrowings under line of credit 2,811,000
Repayment of line of credit (2,208,000)
Issuance of convertible debt 65,000 1,830,000
Financing agreement payments (22,000)
Repurchases from stock compensation program (20,000) (18,000)
Net cash provided by (used in) financing activities 626,000 1,812,000
Net decrease in cash (1,656,000) (1,128,000)
Cash, beginning of year 1,891,000 3,019,000
Cash, end of year $ 235,000 $ 1,891,000