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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Statement of Cash Flows [Abstract]    
Net loss $ (2,824,000) $ (6,134,000)
Adjustments to reconcile net loss to net cash used in operating activities    
Asset impairment 746,000
Loss on asset disposal 18,000
Depreciation and amortization 403,000 444,000
Stock-based compensation 544,000 386,000
Stock and options issued for services 11,000 173,000
Changes in assets and liabilities    
Accounts receivable (695,000) 1,097,000
Other receivables (59,000) (101,000)
Inventories (166,000) (343,000)
Prepaid expenses and other assets 10,000 (20,000)
Accounts payable 202,000 560,000
Disputed accounts payable 499,000
Accrued expenses (402,000) 45,000
Net cash used in operating activities (2,958,000) (2,648,000)
Investing activities    
Purchase of property and equipment (13,000)
Net cash used in investing activities (13,000)
Financing activities    
Proceeds from issuance of stock 5,000
Proceeds from convertible notes 1,830,000
Net cash from financing activities 1,830,000 5,000
Net change in cash and restricted cash (1,128,000) (2,656,000)
Cash and restricted cash, beginning of year 3,019,000 5,675,000
Cash and restricted cash, end of year $ 1,891,000 $ 3,019,000