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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Statement of Cash Flows [Abstract]    
Net loss $ (1,460,000) $ (1,647,000)
Adjustments to reconcile net loss to net cash used in operating activities    
Stock-based compensation 517,000 211,000
Depreciation and amortization 144,000 205,000
Stock and options issued for services 8,000
Changes in assets and liabilities    
Accounts receivable 150,000 (236,000)
Other receivables 141,000 (7,000)
Inventories (320,000) 78,000
Prepaid expenses and other assets 14,000 (22,000)
Accounts payable (756,000) (759,000)
Accrued expenses 21,000 120,000
Net cash used in operating activities (1,549,000) (2,049,000)
Investing activities    
Purchase of property and equipment (4,000)
Net cash used in investing activities (4,000)
Financing activities    
Issuance of debt 65,000
Repurchases from stock compensation program (20,000) (18,000)
Net cash provided by (used in) financing activities 45,000 (18,000)
Net decrease in cash (1,508,000) (2,067,000)
Cash, beginning of period 1,891,000 3,019,000
Cash, end of period 383,000 952,000
Cash paid during the period for:    
Amounts included in the measurement of lease liabilities 20,000
Non-cash financing and investing activities:    
Convertible notes issued in exchange for trade payables 71,000
Conversion of debt and interest to equity 136,000
Acquisition of long-term software license in exchange for contract payable 154,000
Value of shares relinquished in modification of stock-based compensations awards $ 24,000