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INCOME TAXES - Schedule of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Net operating loss carry-forwards	$ 54,459	$ 38,858
Allowance for doubtful accounts and inventory provision	3,311	4,712
Product warranty	6,309	8,769
Impairment of property, plant and equipment	1,367	1,210
Deferred income	334	392
Accrued expense	235	239
Others	838	920
Less: valuation allowance	(66,853)	(55,100)	$ (37,287)	$ (30,857)
Net deferred tax assets	$ 0	$ 0

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