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Note 8 - Affiliates Balances - Recognized Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
1 Months Ended 6 Months Ended
Jan. 31, 2022
Jun. 30, 2022
Jun. 30, 2021
Liabilities      
Bargain purchase gain   $ 1,300 $ (0)
Sonatide [Member]      
Assets      
Current assets $ 12,894    
Net properties and equipment and other assets 2,908    
Total assets 15,802    
Liabilities      
Current liabilities 283    
Other liabilities 2,996    
Total liabilities 3,279    
Net assets acquired 11,223    
Bargain purchase gain $ 1,300