CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Revenue	$ 307,200	$ 282,134	$ 250,080
Cost of services	270,779	257,830	219,608
Gross profit	36,421	24,304	30,472
Selling, general and administrative expenses	33,196	34,427	31,397
Impairment losses and restructuring charges, net	364	3,890	3,965
Operating income (loss)	2,861	(14,013)	(4,890)
Interest and other income (expense), net	(1,748)	(1,139)	(6)
Income (loss) before income taxes	1,113	(15,152)	(4,896)
Income tax expense	718	464	564
Net income (loss)	395	(15,616)	(5,460)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	297	(47)	(415)
Change in fair value of derivative instruments	(248)	(427)	599
Pension remeasurement	253	0	0
Comprehensive income (loss)	$ 697	$ (16,090)	$ (5,276)
Net income (loss) per common share - basic	$ 0.03	$ (1.01)	$ (0.35)
Net income (loss) per common share - diluted	$ 0.02	$ (1.01)	$ (0.35)
Weighted average common shares outstanding - basic	15,731	15,529	15,394
Weighted average common shares outstanding - diluted	16,258	15,529	15,394