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Note 2 - Subordinated Notes Receivable (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Sep. 06, 2018
Mar. 31, 2018
Financing Receivable, after Allowance for Credit Loss, Total       $ 7,400
A&R Note [Member]        
Financing Receivable, before Allowance for Credit Loss, Total     $ 3,300  
S&L Note [Member]        
Financing Receivable, before Allowance for Credit Loss, Total     $ 4,400  
Notes Receivable, Interest Rate     10.00%  
Proceeds from Interest Received $ 0 $ 0