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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
Sep. 30, 2023
Jun. 30, 2023
Jan. 01, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Factored Receivable Unpaid Principal Balance $ 5,900,000     $ 7,000,000.0      
Factored Receivable, Customer Reserves 1,900,000     1,400,000      
Retained Earnings (Accumulated Deficit) 73,602,000     71,808,000      
Financing Receivable, Allowance for Credit Loss $ 8,559,000 $ 9,226,000   8,129,000 $ 7,386,000 $ 7,202,000 $ 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