INCOME TAXES - Reconciliation of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Statutory income tax rate	35.00%	35.00%	35.00%
Reconciliation of income tax provision [Abstract]
Statutory U.S. federal income tax	$ (1,998)	$ (9,131)	$ 2,042
U.S. state income tax, net of federal benefit	(158)	(340)	(15)
Foreign rate differential	164	692	(1,558)
Domestic production activities deduction	0	0	(21)
Tax audit adjustments	0	0	(338)
Intercompany distributions	0	0	16
Equity compensation	339	224	338
Deemed repatriation of foreign earnings	0	810	0
Current year tax credits	0	0	(156)
Impairment of goodwill	0	498	0
Other	97	(1,513)	(132)
Change in valuation allowances	2,353	6,642	3,737
Income tax provision (benefit)	$ 797	$ (2,118)	$ 3,913