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Note 9 - Fair Value Measurements - Fair Value of Financial Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Interest rate swap $ 0 $ 27
Fair Value, Recurring [Member]    
Total liabilities at fair value 0 27
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Total liabilities at fair value 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Total liabilities at fair value 0 27
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Total liabilities at fair value 0 0
Fair Value, Recurring [Member] | Interest Rate Swap [Member]    
Interest rate swap 0 27
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member]    
Interest rate swap 0 0
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]    
Interest rate swap 0 27
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]    
Interest rate swap $ 0 $ 0