SIGNIFICANT ACCOUNTING POLICIES - Revenue recognition - Primary Geographical Market (Details) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($)
Disaggregation of Revenue [Line Items]
Number of Operating Segments | segment				1
Number of Reportable Segments | segment				1
Total revenues		$ 158,917	$ 122,651	$ 444,065	$ 334,184
Greater China
Disaggregation of Revenue [Line Items]
Total revenues	[1]	50,162	39,412	139,988	116,439
United States
Disaggregation of Revenue [Line Items]
Total revenues		20,675	16,731	58,985	38,100
All other countries
Disaggregation of Revenue [Line Items]
Total revenues	[2]	$ 88,080	$ 66,508	$ 245,092	$ 179,645

[1] Greater China is inclusive of Mainland China, Hong Kong and Taiwan

[2] No single country included in the other countries’ category generated more than 10% of total revenue