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Note 4 - Investments (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Equity Method Investments     $ 4,070,000    
Ownership Percentage         28.00%
Gain (Loss) on Investments, Total $ 38,000   $ (195,000)    
Payments to Acquire Investments, Total       $ 1,000,000  
Long-Term Investments, Total 6,550,000       $ 6,355,000
Marketable Securities, Current 983,000       0
Long-term Investments [Member]          
Equity Method Investments $ 1,479,000        
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member]          
Equity Method Investment, Ownership Percentage 40.00%        
Transfer Advisory Business to New Entity [Member]          
Financing Receivable, after Allowance for Credit Loss, Total         2,806,000
Cash         $ 800,000
Privately Held Company Providing Supply Chain and Receivables Financing [Member]          
Payments to Acquire Investments, Total $ 988,000 $ 1,000,000      
Long-Term Investments, Total 1,000,000        
Marketable Securities, Current $ 983,000