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Note 1 - Significant Accounting Policies 1 (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Retained Earnings (Accumulated Deficit), Ending Balance $ (66,312,000) $ (66,312,000) $ (65,015,000)  
Working Capital Deficit 310,000 310,000    
Long-term Debt, Current Maturities, Total 2,023,000 2,023,000 0  
Accounts Receivable, Allowance for Credit Loss, Ending Balance 7,000 7,000 7,000 $ 8,000
Share-based Payment Arrangement, Noncash Expense, Total 469,000   392,000  
Cash, Uninsured Amount 7,700,000 7,700,000 18,700,000  
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   0 0  
Goodwill and Intangible Asset Impairment, Total   0 0  
Goodwill, Ending Balance $ 780,000 $ 780,000 780,000  
Operating Loss, Carry forwards, Expiration Term (Year)   20 years    
Factoring Agreement, Gross Amount Factored   $ 37,300,000 $ 56,600,000  
Customer Concentration Risk [Member] | Accounts Receivable [Member] | US-based IT OEM Company [Member]        
Concentration Risk, Percentage   51.00% 70.00%  
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Us-based Data Center [Member]        
Concentration Risk, Percentage   29.00%    
Selling, General and Administrative Expenses [Member]        
Share-based Payment Arrangement, Noncash Expense, Total   $ 500,000 $ 400,000  
Interest Expense [Member]        
Factoring Agreement, Finance Fees Paid   $ 177,000 $ 329,000