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Note 2 - Acquistions - Recognized Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Liabilities      
Bargain purchase gain $ (0) $ 1,300 $ (0)
Sonatide [Member]      
Assets      
Current assets   12,894  
Net properties and equipment and other assets   2,907  
Total assets   15,801  
Liabilities      
Current liabilities   283  
Other liabilities   2,995  
Total liabilities   3,278  
Net assets acquired   11,223  
Bargain purchase gain   $ 1,300