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Note 1 - Overview and Summary of Significant Accounting Policies - Fair Value of Cash, Notes Receivable and Accounts Receivable (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Cash $ 1,826 $ 1,256
Notes receivable, net 4,500 4,200
Fair Value, Inputs, Level 1 [Member]    
Cash 1,826 1,256
Notes receivable, net 0 0
Accounts receivable 0 0
Notes receivable - impaired 0 0
Total assets at fair value 1,826 1,256
Line of credit 0 0
Total liabilities at fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Term Loan [Member]    
Term loan payable 0 0
Fair Value, Inputs, Level 2 [Member]    
Cash 0 0
Notes receivable, net 4,322 4,027
Accounts receivable 41,300 38,239
Notes receivable - impaired
Total assets at fair value 45,622 42,266
Line of credit 5,464 171
Total liabilities at fair value 9,977 3,237
Fair Value, Inputs, Level 2 [Member] | Term Loan [Member]    
Term loan payable 4,513 3,066
Fair Value, Inputs, Level 3 [Member]    
Cash 0 0
Notes receivable, net 0 0
Accounts receivable 0 0
Notes receivable - impaired 140 140
Total assets at fair value 140 140
Line of credit 0 0
Total liabilities at fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Term Loan [Member]    
Term loan payable 0 0
Reported Value Measurement [Member]    
Cash 1,826 1,256
Notes receivable, net 4,322 4,027
Accounts receivable 41,300 38,239
Notes receivable - impaired 140 140
Total assets at fair value 47,588 43,662
Line of credit 5,464 171
Total liabilities at fair value 9,977 3,237
Reported Value Measurement [Member] | Term Loan [Member]    
Term loan payable $ 4,513 $ 3,066