LINE OF CREDIT, SHORT TERM DEBT AND BANK ACCEPTANCE NOTES (Lines of Credit) (Details) - USD ($) $ in Thousands	1 Months Ended			12 Months Ended
	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
Line of Credit Facility [Line Items]
Repayment of short-term loans				$ 7,836	$ 6,157
China Everbright Bank [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 6,900		5,800
Credit exposure		$ 3,500		2,900
Collateral amount				1,800
Note payable				5,800
Restricted cash deposit				$ 2,900
Required cash deposit		50.00%		50.00%
Expiration				Jun. 30, 2017
Citic Bank [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 11,300		$ 15,400		3,000
Credit exposure	11,300		5,700		5,700
Amount outstanding	$ 5,300		$ 1,000		$ 2,600
Interest rate	5.96%		7.08%		5.90%
Note payable	$ 5,000				$ 6,400
Restricted cash deposit	5,000
Unused Credit line	$ 5,900
Expiration	Mar. 31, 2018				Mar. 31, 2016
Beginning maturity date	Mar. 25, 2017				Mar. 01, 2016
Ending maturity date	Apr. 26, 2017				Apr. 30, 2016
Debt instrument maturity period	2 years		1 year
Citic Bank [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Required cash deposit					50.00%
Citic Bank [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Required cash deposit					100.00%
Industrial And Commercial Bank Of China [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 4,700
Credit exposure				$ 4,300
Amount outstanding				$ 4,300	$ 4,600
Note payable					$ 800
Expiration				Mar. 31, 2017
Beginning maturity date				Jun. 03, 2017	Apr. 01, 2015
Ending maturity date				Oct. 20, 2017	Nov. 30, 2016
Industrial And Commercial Bank Of China [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Interest rate				4.36%	5.00%
Industrial And Commercial Bank Of China [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Interest rate				5.00%	6.90%