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SIGNIFICANT ACCOUNTING POLICIES - Share based compensation expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Total share-based compensation expenses $ 15,122 $ 14,164 $ 8,771
Cost of revenues      
Total share-based compensation expenses 425 411 181
Research and development expenses, net      
Total share-based compensation expenses 3,481 2,772 1,535
Selling and marketing expenses      
Total share-based compensation expenses 6,032 6,170 3,635
General and administrative expenses      
Total share-based compensation expenses $ 5,184 $ 4,811 $ 3,420