OTHER INCOME - Summary of Other Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
OTHER INCOME
COVID-19 relief		$ 1,111
Unrealized and realized gain (loss) on investments (Note 5)	$ 445
Foreign currency gain	2,987	291
Other income, net	439	10
Total other income	$ 3,871	$ 1,412