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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Statement of Cash Flows [Abstract]    
Net loss $ (1,931,000) $ (1,973,000)
Adjustments to reconcile net loss to net cash used in operating activities    
Stock-based compensation 461,000 757,000
Depreciation and amortization 185,000 217,000
Amortization of debt discount (12,000) 17,000
Changes in assets and liabilities    
Accounts receivable (1,660,000) (842,000)
Other receivables (7,000) 130,000
Inventories 426,000 444,000
Prepaid expenses and other assets (269,000) (95,000)
Accounts payable 529,000 (379,000)
Accrued expenses 105,000 180,000
Net cash used in operating activities (2,173,000) (1,544,000)
Investing activities    
Purchase of property and equipment (42,000) (61,000)
Net cash used in investing activities (42,000) (61,000)
Financing activities    
Borrowings under line of credit 4,389,000 930,000
Repayment of line of credit (3,250,000) (847,000)
Issuance of convertible debt 65,000
Financing agreement payments (81,000) (13,000)
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 3,871,000 115,000
Net increase (decrease) in cash 1,656,000 (1,490,000)
Cash, beginning of period 235,000 1,891,000
Cash, end of period 1,891,000 401,000
Non-cash financing and investing activities:    
Financed acquisition of long-term assets 454,000 245,000
Conversion of debt and interest to equity 136,000
Convertible notes issued in exchange for trade payables 71,000
Cash paid for interest $ 53,000 $ 7,000