Segments Summary of the operating segments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Number of Reportable Segments	2
Revenue
Product	$ 62,393	$ 65,028	$ 50,322
Service	40,105	35,929	29,181
Total revenue	102,498	100,957	79,503
Cost of revenue
Product	21,714	21,551	17,465
Service	16,595	15,070	14,042
Cost of Goods and Services Sold	38,309	36,621	31,507
Gross Profit [Abstract]
Gross Profit, Goods	40,679	43,477	32,857
Gross Profit, Services	23,510	20,859	15,139
Gross profit	64,189	64,336	47,996
Operating Expenses	74,749	59,440	48,802
Interest income (expense) and other	204	(1,376)	(1,388)
(Loss) income before income taxes	$ (10,356)	$ 3,520	$ (2,194)