INCOME TAXES - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Net operating loss carry forward	$ 3,861	$ 13,149
Research and development and other credit carry forward	28,046	26,591
Foreign tax credit carry forward	11,764	11,010
Capitalized research and experimental expenses	10,069	0
Accruals deductible in different periods	7,713	3,362
Leases	1,623	1,472
Stock-based compensation	1,948	1,442
Total deferred tax assets	65,024	57,026
Less: valuation allowance	(59,215)	(51,586)
Deferred tax assets, net of valuation allowance	5,809	5,440
Deferred tax liabilities
Property and equipment, net	(540)	178
Operating lease right-of-use assets	(1,635)	(1,472)
Intangible assets	(3,617)	(4,129)
Deferred tax liabilities	(5,792)	(5,423)
Net deferred tax assets	$ 17	$ 17