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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended 60 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2023
Cash flows from operating activities:      
Net loss $ (235,000) $ (1,467,000) $ (24,000,000)
Adjustments to reconcile net loss to net cash provided by (used in) operating activites      
Depreciation and amortization 279,000 383,000  
Equity compensation charge 21,000 162,000  
Change in assets and liabilities:      
Accounts receivable (2,357,000) 1,825,000  
Inventories 534,000 (449,000)  
Prepaid expenses and other assets 57,000 836,000  
Trade payables (396,000) (819,000)  
Accrued liabilities 980,000 1,897,000  
Net cash (used in) provided by operating activities (1,117,000) 2,368,000  
Cash flows from investing activities:      
Purchases of property, plant and equipment (221,000) (163,000)  
Proceeds from Sale of building  
Net cash (used in) provided by investing activities (221,000) (163,000)  
Cash flows from financing activities:      
Repayment of debt and revolving line of credit (2,125,000)  
Proceeds from issuance of long-term debt and revolving line of credit 2,113,000  
Net cash provided by (used in) financing activities 2,113,000 (2,125,000)  
Net increase (decrease) in cash and cash equivalents 775,000 80,000  
Cash and cash equivalents at beginning of year 146,000 66,000  
Cash and cash equivalents at end of year 921,000 146,000 $ 921,000
Supplemental disclosure of cash flow information:      
Cash payments for interest 551,000 375,000  
Accrued dividend and accretion on preferred stock 11,000 584,000  
Lease right-of-use assets and lease liability 747,000  
Conversion of preferred stock into common stock 1,500,000 6,745,000  
Conversion of notes and deposits into common stock 1,202,000  
Cash receipts for tax refund $ 202,000