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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
Dec. 31, 2022
Dec. 31, 2021
Cash $ 3,049 $ 1,256
Notes receivable, net 3,500 3,900
Fair Value, Inputs, Level 1 [Member]    
Cash 3,049 1,256
Notes receivable, net 0 0
Accounts receivable 0 0
Total assets at fair value 3,049 1,256
Line of credit 0 0
Total liabilities at fair value 0 0
Notes receivable - impaired   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 3,492 4,027
Accounts receivable 45,728 38,239
Total assets at fair value 49,220 42,266
Line of credit 12,543 171
Total liabilities at fair value 16,538 3,237
Notes receivable - impaired   0
Fair Value, Inputs, Level 2 [Member] | Term Loan [Member]    
Term loan payable 3,995 3,066
Fair Value, Inputs, Level 3 [Member]    
Cash 0 0
Notes receivable, net 0 0
Accounts receivable 0 0
Total assets at fair value 0 140
Line of credit 0 0
Total liabilities at fair value 0 0
Notes receivable - impaired   140
Fair Value, Inputs, Level 3 [Member] | Term Loan [Member]    
Term loan payable 0 0
Reported Value Measurement [Member]    
Cash 3,049 1,256
Notes receivable, net 3,492 4,027
Accounts receivable 45,728 38,239
Total assets at fair value 52,269 43,662
Line of credit 12,543 171
Total liabilities at fair value 16,538 3,237
Notes receivable - impaired   140
Reported Value Measurement [Member] | Term Loan [Member]    
Term loan payable $ 3,995 $ 3,066