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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
Jun. 30, 2022
Dec. 31, 2021
Cash $ 1,128 $ 1,256
Notes receivable, net 4,000 3,900
Fair Value, Inputs, Level 1 [Member]    
Cash 1,128 1,256
Notes receivable, net 0 0
Accounts receivable 0 0
Notes receivable - impaired 0 0
Total assets at fair value 1,128 1,256
Line of credit 0 0
Total liabilities at fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Term Loan [Member]    
Term loans payable 0 0
Fair Value, Inputs, Level 2 [Member]    
Cash 0 0
Notes receivable, net 3,946 4,027
Accounts receivable 45,676 38,239
Notes receivable - impaired 0
Total assets at fair value 49,622 42,266
Line of credit 2,839 171
Total liabilities at fair value 7,138 3,237
Fair Value, Inputs, Level 2 [Member] | Term Loan [Member]    
Term loans payable 4,299 3,066
Fair Value, Inputs, Level 3 [Member]    
Cash 0 0
Notes receivable, net 0 0
Accounts receivable 0 0
Notes receivable - impaired 72 140
Total assets at fair value 72 140
Line of credit 0 0
Total liabilities at fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Term Loan [Member]    
Term loans payable 0 0
Reported Value Measurement [Member]    
Cash 1,128 1,256
Notes receivable, net 3,946 4,027
Accounts receivable 45,676 38,239
Notes receivable - impaired 72 140
Total assets at fair value 50,822 43,662
Line of credit 2,839 171
Total liabilities at fair value 7,138 3,237
Reported Value Measurement [Member] | Term Loan [Member]    
Term loans payable $ 4,299 $ 3,066