OTHER PAYABLE AND ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
OTHER PAYABLE AND ACCRUED EXPENSES [Abstract]
Accrued commissions	$ 12,507	$ 7,127
Accrued warranty	6,631	3,975	$ 2,811	$ 1,710
Accrued payroll	5,684	3,068
Accrued professional fees	785	384
Accrued machine testing fees	149	1,595
Others	5,979	2,656
Total	$ 31,735	$ 18,805