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OTHER INCOME - Summary of Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
OTHER INCOME
COVID-19 Relief	$ 1,725	$ 2,691	$ 2,836	$ 2,691
Unrealized and realized (loss) on investments (Note 5)		279		(619)
Foreign currency (loss) gain	(194)	60	97	1,868
Other income, net	2,264	14	2,274	41
Total other income	$ 3,795	$ 3,044	$ 5,207	$ 3,981

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