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Note 4 - Fair Value Measurements (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 21, 2021
Asset Impairment Charges $ 0 $ 0 $ 0  
Goodwill, Impairment Loss 0 0 0 $ 0
Impairment, Long-Lived Asset, Held-for-Use 0 $ 0 $ 0  
Impairment, Long-Lived Asset, Held-for-Use, Total 34,701      
Drawdowns as Loans [Member] | New Credit Facility [Member]        
Impairment, Long-Lived Asset, Held-for-Use, Total $ 20,000