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Note 9 - Debt (Details Textual) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Restricted Cash, Current $ 4,958 $ 1,240
Revolving Credit Facility [Member]    
Line of Credit Facility, Maximum Borrowing Capacity 25,000  
Long-Term Line of Credit, Total 0  
Nordic Bond [Member]    
Debt Instrument, Fair Value Disclosure, Total $ 184,300 $ 177,600