Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Revenues	$ 123,933	$ 123,738	$ 366,672	$ 351,783
Cost of revenues (exclusive of depreciation and amortization, shown separately below)
Cost of Goods and Services Sold	79,183	81,139	238,004	233,718
Selling, general and administrative	29,322	27,072	85,945	78,884
Depreciation	995	1,123	3,057	3,587
Amortization	4,009	3,936	12,029	11,098
Acquisition costs	497	(100)	1,337	1,283
Adjustment to fair value of contingent consideration	666	(389)	1,757	(828)
Income from operations	9,261	10,957	24,543	24,041
Other Income (Expense)
Net interest expense	831	440	1,718	1,444
Net other (income) expense	(6)	(15)	43	(84)
Income before income taxes	8,436	10,532	22,782	22,681
Provision for income taxes	2,131	3,505	5,699	10,535
Net income	$ 6,305	$ 7,027	$ 17,083	$ 12,146
Basic net income per share (in dollars per share)	$ 0.19	$ 0.22	$ 0.52	$ 0.37
Diluted net income per share (in dollars per share)	$ 0.19	$ 0.21	$ 0.50	$ 0.36
Shares used in computing basic net income per share (in shares)	32,648	32,673	32,724	32,997
Shares used in computing diluted net income per share (in shares)	33,645	33,991	33,846	34,085
Services
Revenues
Revenues	$ 122,879	$ 117,415	$ 363,986	$ 329,192
Cost of revenues (exclusive of depreciation and amortization, shown separately below)
Cost of Goods and Services Sold	79,183	75,971	238,004	214,858
Software and hardware
Revenues
Revenues	1,054	6,323	2,686	22,591
Cost of revenues (exclusive of depreciation and amortization, shown separately below)
Cost of Goods and Services Sold	$ 0	$ 5,168	$ 0	$ 18,860