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Other Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Lease expenses and payable for leasehold improvement due to a related party (note 11)	$ 2,248	$ 2,024
Commissions	928	836
Accrued warranty	979	839
Accrued payroll	227	745
Accrued professional fees	196	60
Accrued machine testing fee	1,038	684
Others	926	849
Total	$ 6,542	$ 6,037

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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