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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Statement of Cash Flows [Abstract]    
Net loss $ (1,641,000) $ (1,460,000)
Adjustments to reconcile net loss to net cash used in operating activities    
Stock-based compensation 297,000 517,000
Depreciation and amortization 149,000 144,000
Gain on asset disposal
Amortization of line of credit discount 11,000
Changes in assets and liabilities    
Accounts receivable 278,000 150,000
Other receivables 33,000 141,000
Inventories (342,000) (320,000)
Prepaid expenses and other assets 4,000 14,000
Accounts payable (300,000) (756,000)
Accrued expenses (64,000) 21,000
Net cash used in operating activities (1,575,000) (1,549,000)
Investing activities    
Purchase of property and equipment (94,000) (4,000)
Net cash used in investing activities (94,000) (4,000)
Financing activities    
Borrowings under line of credit 782,000
Repayment of line of credit (1,402,000)
Issuance of convertible debt 65,000
Financing agreement payments (47,000)
Issuance of common stock, net of $26,000 issuance cost 2,974,000
Shares repurchased for income tax withholding under stock compensation program (161,000) (20,000)
Net cash provided by financing activities 2,146,000 45,000
Net increase (decrease) in cash 477,000 (1,508,000)
Cash, beginning of period 235,000 1,891,000
Cash, end of period 712,000 383,000
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
Financed acquisition of long-term assets 154,000
Cash paid for interest $ 24,000 $ 7,000