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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
Mar. 31, 2023
Jan. 01, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Factored Receivable Unpaid Principal Balance $ 7,700,000   $ 7,000,000.0    
Factored Receivable, Customer Reserves 1,700,000   1,400,000    
Retained Earnings (Accumulated Deficit) 71,449,000   71,808,000    
Financing Receivable, Allowance for Credit Loss $ 10,032,000   8,129,000 $ 6,786,000 $ 6,715,000
Cumulative Effect, Period of Adoption, Adjustment [Member]          
Off-Balance-Sheet, Credit Loss, Liability   $ 417,000      
Accounting Standards Update 2016-13 [Member]          
Financing Receivable, Allowance for Credit Loss   8,129,000 8,129,000    
Off-Balance-Sheet, Credit Loss, Liability   0      
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]          
Retained Earnings (Accumulated Deficit)   (1,700,000)      
Financing Receivable, Allowance for Credit Loss   1,907,000 $ 1,907,000    
Off-Balance-Sheet, Credit Loss, Liability   417,000      
Deferred Tax Assets, Gross   $ 604,000