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GEOGRAPHIC INFORMATION - Total revenues and Long-lived assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
GEOGRAPHIC INFORMATION      
Total revenues $ 275,093 $ 248,920 $ 220,774
Long-lived assets 19,048 23,221 30,592
Americas, principally the United States      
GEOGRAPHIC INFORMATION      
Total revenues 139,583 115,806 103,190
Long-lived assets 3,588 977 4,310
Europe      
GEOGRAPHIC INFORMATION      
Total revenues 87,679 88,746 75,490
Long-lived assets 328 662 403
Eastern Asia      
GEOGRAPHIC INFORMATION      
Total revenues 42,108 38,988 36,083
Long-lived assets 901 706 768
Israel      
GEOGRAPHIC INFORMATION      
Total revenues 5,723 5,380 6,011
Long-lived assets $ 14,231 $ 20,876 $ 25,111