INCOME TAXES (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Long-term deferred tax assets (liabilities):
Fixed assets	$ 2,511	$ 2,077	$ 704
Prepaid expenses	(569)	(554)	(343)
Accrued stock compensation	4,641	4,114	3,656
Accrued restructuring costs	0	303	65
Work opportunity credit carryforward	5,226	5,234	5,121
Operating loss carryforward	16,231	18,066	13,717
Intangibles and goodwill	(77)	(53)	(35)
Derivative Instruments	354	202	456
Cumulative Translation adjustment	(1,381)	(1,178)	(1,150)
Other	297	39	589
Net long-term deferred tax assets	27,233	28,250	22,780
Subtotal	27,233	28,250	22,780
Valuation allowance	(27,384)	(28,162)	(22,314)
Total net deferred tax asset (liability)	$ (151)	$ 88	$ 466