Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue
Services	$ 59,156	$ 67,350	$ 183,293	$ 196,671
Systems	41,984	27,982	87,641	69,972
Total revenue	101,140	95,332	270,934	266,643
Direct costs of revenue
Direct cost of services revenue	36,177	36,758	105,579	107,357
Direct cost of systems revenue	28,657	22,668	61,461	50,346
Total direct cost of revenue	64,834	59,426	167,040	157,703
Services gross profit	22,979	30,592	77,714	89,314
Systems gross profit	13,327	5,314	26,180	19,626
Total gross profit	36,306	35,906	103,894	108,940
Operating expenses
Research and development expense	7,277	10,473	24,647	32,121
Sales and marketing expense	6,382	6,607	18,848	19,855
General and administrative expense	12,024	11,127	36,430	35,951
Depreciation and amortization of property and equipment	3,047	3,208	9,111	9,977
Amortization of acquired intangible assets	916	950	2,759	2,848
Total operating expenses	29,646	32,365	91,795	100,752
Income from operations	6,660	3,541	12,099	8,188
Interest expense	(2,055)	(2,007)	(6,096)	(6,237)
Amortization of deferred financing fees	(154)	(203)	(473)	(583)
Other income (expense), net	(14)	(688)	686	(551)
Net income before income taxes	4,437	643	6,216	817
Income tax provision	(1,413)	(2,607)	(2,180)	(2,200)
Net income (loss)	$ 3,024	$ (1,964)	$ 4,036	$ (1,383)
Net income (loss) per share-basic	$ 0.05	$ (0.03)	$ 0.07	$ (0.02)
Net income (loss) per share-diluted	$ 0.05	$ (0.03)	$ 0.06	$ (0.02)
Weighted average shares outstanding-basic	61,171	59,586	60,798	59,356
Weighted average shares outstanding-diluted	63,243	59,586	62,627	59,356