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Note 9 - Debt (Details Textual) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Nov. 16, 2021
Restricted Cash, Current $ 4,972 $ 1,241      
Revolving Credit Facility [Member]          
Line of Credit Facility, Maximum Borrowing Capacity         $ 25,000
Long-term Line of Credit, Total       $ 0  
Nordic Bond [Member]          
Long-Term Debt, Fair Value   $ 177,300 $ 182,800