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Note 11 - Accumulated Other Comprehensive (Loss) Income - Components of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Balance $ 1,165,476 $ 1,159,493
Balance 1,186,560 1,165,476
AOCI Attributable to Parent [Member]    
Balance (1,593) 337
Foreign currency translation adjustment 925 (1,930)
Balance $ (668) $ (1,593)