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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Cash flows from operating activities:    
Net income/loss from continuing operations $ 396,000 $ (21,000)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities    
Depreciation and amortization 80,000 98,000
Equity compensation expense 7,000 31,000
Provision for losses on accounts receivable
Change in assets and liabilities:    
Accounts receivable (1,726,000) 125,000
Inventories 381,000 (620,000)
Prepaid expenses and other assets (100,000) 339,000
Trade payables (35,000) 215,000
Accrued liabilities (372,000) (167,000)
Net cash (used in) provided by operating activities (1,369,000) 2,000
Cash flows from investing activities:    
Purchases of property, plant and equipment (56,000) (15,000)
Net cash used in investing activities (56,000) (15,000)
Cash flows from financing activities:    
Proceeds from issuance of long-term debt and revolving line of credit 1,409,000 155,000
Net cash provided by financing activities 1,409,000 155,000
Net (decrease) / increase in cash and cash equivalents (16,000) 142,000
Cash and cash equivalents at beginning of period 146,000 66,000
Cash and cash equivalents at end of period 130,000 208,000
Supplemental disclosure of cash flow information and noncash investing and financing activities:    
Cash payments for interest 118,000 78,000
Accrued Divided and Accretion on preferred stock 11,000 202,000
Lease right-of-use assets and lease liability 747,000
Conversion of notes and deposits into common stock $ 885,000