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Note 4 - Investments (Details Textual) - USD ($)
2 Months Ended 3 Months Ended
Mar. 31, 2022
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2021
Jun. 30, 2019
Equity Method Investments $ 3,807,000        
Ownership Percentage 28.00%        
Gain (Loss) on Investments, Total $ (103,000)   $ (133,000)    
Long-Term Investments, Total 6,252,000     $ 6,355,000  
Long-term Investments [Member]          
Equity Method Investments 1,445,000        
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, Ending Balance $ 800,000        
Privately Held Company Providing Supply Chain and Receivables Financing [Member]          
Payments to Acquire Investments, Total   $ 1,000,000      
Long-Term Investments, Total   $ 1,000,000