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Note 2 - Subordinated Notes Receivable (Details Textual) - USD ($)
3 Months Ended
Mar. 16, 2020
Mar. 13, 2020
Mar. 12, 2020
Mar. 04, 2020
Feb. 28, 2020
Jan. 31, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Mar. 06, 2020
Dec. 31, 2019
Feb. 07, 2019
Sep. 06, 2018
Mar. 31, 2018
Financing Receivable, after Allowance for Credit Loss, Total                           $ 7,400,000
Accretion (Amortization) of Discounts and Premiums, Investments             $ 37,000   $ 103,000          
A&R Note [Member]                            
Financing Receivable, before Allowance for Credit Loss, Total                         $ 3,300,000  
Second A&R Note [Member]                            
Financing Receivable, after Allowance for Credit Loss, Total             $ 1,300,000     $ 709,000      
Financing Receivable, before Allowance for Credit Loss, Total                   2,564,000 $ 3,200,000    
Notes Receivable, Interest Rate                       6.00%    
Impairment of Notes Receivable               $ 897,000            
Second A&R Note [Member] | Loan Parties [Member]                            
Proceeds from Collection of Finance Receivables $ 392,000 $ 750,000 $ 250,000 $ 350,000 $ 200,000 $ 130,000                
Gain (Loss) on Payoff of Notes Receivable             1,300,000              
Second Forbearance Extension Letter Agreement, Second A&R Note due March 12, 2020 [Member] | Loan Parties [Member]                            
Financing Receivable, before Allowance for Credit Loss, Total                   $ 250,000        
Second Forbearance Extension Letter Agreement, Second A&R Note due March 13, 2020 [Member] | Loan Parties [Member]                            
Financing Receivable, before Allowance for Credit Loss, Total                   750,000        
Second Forbearance Extension Letter Agreement, Second A&R Note due March 17, 2020 [Member] | Loan Parties [Member]                            
Financing Receivable, before Allowance for Credit Loss, Total                   $ 391,970        
S&L Note [Member]                            
Financing Receivable, after Allowance for Credit Loss, Total             $ 2,700,000       $ 2,700,000      
Financing Receivable, before Allowance for Credit Loss, Total                         $ 4,400,000  
Notes Receivable, Interest Rate             10.00%              
Proceeds from Collection of Finance Receivables             $ 2,000   643,000          
Proceeds from Interest Received             83,000   97,000          
Accretion (Amortization) of Discounts and Premiums, Investments             $ 37,000   $ 49,000