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Note 7 - Assets Held for Sale, Asset Sales and Asset Impairments - Activity in Assets Held for Sale (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Beginning balance 23    
Additions 7 32 46
Sales   (53)  
Reactivation (1) 0 0
Ending balance 18 23  
Vessels Held for Sale [Member]      
Beginning balance 23 46 0
Beginning balance $ 34,396 $ 39,287 $ 0
Additions 7 32 46
Additions $ 18,096 $ 97,663 $ 66,033
Sales (9) (53) 0
Sales $ (15,433) $ (26,877) $ 0
Reactivation (3) (2) 0
Reactivation $ (7,250) $ (500) $ 0
Impairment $ (15,388) $ (75,177) $ (26,746)
Ending balance 18 23 46
Ending balance $ 14,421 $ 34,396 $ 39,287