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Note 11 - Revenues - Revenue by Geographic Destination (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Total revenues $ 25,363 $ 26,922 $ 84,097 $ 84,908
UNITED STATES        
Total revenues 12,017 11,511 36,655 38,278
Europe [Member]        
Total revenues 7,063 7,344 23,836 22,361
Greater China [Member]        
Total revenues 3,489 4,497 13,824 11,624
Rest of the World [Member]        
Total revenues $ 2,794 $ 3,570 $ 9,782 $ 12,645