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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Statement of Cash Flows [Abstract]    
Net loss $ (449,000) $ (889,000)
Adjustments to reconcile net loss to net cash used in operating activities    
Stock-based compensation 366,000 268,000
Depreciation and amortization 74,000 86,000
Stock and options issued for services 8,000
Changes in assets and liabilities    
Accounts receivable (545,000) (445,000)
Other receivables 140,000 90,000
Inventories (70,000) (7,000)
Prepaid expenses and other assets (107,000) (92,000)
Accounts payable (271,000) (228,000)
Accrued expenses 93,000 (15,000)
Net cash used in operating activities (769,000) (1,224,000)
Financing activities    
Issuance of debt (Note 6) 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 and restricted cash (724,000) (1,242,000)
Cash, beginning of period 1,891,000 3,019,000
Cash, end of period 1,167,000 1,777,000
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