Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements of Income [Abstract]
Revenue	$ 208,503	$ 203,117	$ 184,081
Operating expenses:
Cost of revenue	134,390	137,482	126,069
Selling, general and administrative expenses	52,527	49,102	40,735
Depreciation of property and equipment	7,084	5,401	4,903
Amortization of intangible assets	7,224	4,991	4,131
Total operating expenses	201,225	196,976	175,838
Operating income	7,278	6,141	8,243
Foreign currency transaction (gains) losses on short-term intercompany balances	(377)	417	422
Interest expense	(1,116)	(1,904)	(1,451)
Interest income	150	288	146
Loss on debt extinguishment (Note 5)			(1,381)
Earnings before income taxes	6,689	4,108	5,135
Income tax expense (Note 7)	1,297	1,292	1,882
Net earnings	$ 5,392	$ 2,816	$ 3,253
Basic earnings per common share (Note 3)	$ 0.21	$ 0.11	$ 0.14
Diluted earnings per common share (Note 3)	$ 0.21	$ 0.11	$ 0.13
Weighted-average common shares outstanding (Note 3):
Basic	25,566	24,634	23,906
Diluted	26,137	25,029	24,144