OTHER INCOME - Summary of Other Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
OTHER INCOME
COVID-19 Relief	$ 1,111
Unrealized and realized (loss) on investments (Note 5)		$ (898)
Foreign currency (loss) gain	291	1,808
Other income, net	10	27
Total other income	$ 1,412	$ 937