Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Revenue, net	$ 161,620	$ 140,844	$ 138,302
Operating expenses:
Cost of revenue	102,052	91,299	93,169
Selling, general and administrative expenses	46,941	39,399	32,284
Depreciation of property and equipment	4,569	5,033	5,317
Amortization of intangible assets	3,634	1,832	2,458
Acquisition-related adjustments	(2,283)	0	0
Total operating expenses	154,913	137,563	133,228
Operating income from continuing operations	6,707	3,281	5,074
Foreign currency transaction (gains) losses on short-term intercompany balances	(2,190)	84	2,165
Interest expense	(1,785)	(107)	(71)
Interest income	246	260	261
Other (income) loss	(160)	(121)	1,191
Net income from continuing operations before income tax	7,518	3,471	1,908
Income tax expense	2,962	1,242	369
Net income from continuing operations	4,556	2,229	1,539
Discontinued operations:
Loss from discontinued operations	(1,372)	(1,324)	(4,765)
Income tax expense (benefit)	0	0	0
Net loss from discontinued operations	(1,372)	(1,324)	(4,765)
Net income from continuing operations	$ 3,184	$ 905	$ (3,226)
Basic earnings (loss) per common share (Note 3):
Basic earnings from continuing operations (in USD per share)	$ 0.21	$ 0.10	$ 0.06
Basic earnings from discontinued operations (in USD per share)	(0.06)	(0.06)	(0.18)
Total basic earnings (loss) per common share (in USD per share)	0.15	0.04	(0.12)
Diluted earnings (loss) per common share (Note 3):
Diluted earnings from continuing operations (in USD per share)	0.21	0.10	0.06
Diluted earnings from discontinued operations (in USD per share)	(0.06)	(0.06)	(0.18)
Total diluted earnings (loss) per common share (in USD per share)	$ 0.15	$ 0.04	$ (0.12)
Weighted-average common shares outstanding (Note 3):
Basic (shares)	21,937	21,969	25,868
Diluted (shares)	22,111	22,016	25,904