Segments Operating Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Segments	Sep. 30, 2013
Segment Reporting [Abstract]
Number of reportable segments			2
Revenue
Product	$ 12,020	$ 15,666	$ 38,059	$ 43,966
Service	11,104	10,401	32,760	29,810
Total revenue	23,124	26,067	70,819	73,776
Cost of revenue
Product	4,706	5,635	14,117	15,581
Service	4,883	4,155	14,225	12,409
Cost of Goods and Services Sold	9,589	9,790	28,342	27,990
Gross profit
Product	7,314	10,031	23,942	28,385
Service	6,221	6,246	18,535	17,401
Total gross profit	13,535	16,277	42,477	45,786
Calculation of pretax profit (loss) [Abstract]
Operating expenses	21,292	19,662	63,630	54,532
Interest (expense) income, net and other	(49)	163	90	115
Loss before income taxes	$ (7,806)	$ (3,222)	$ (21,063)	$ (8,631)