Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
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
Total cost of revenue	9,589	9,790	28,342	27,990
Gross profit	13,535	16,277	42,477	45,786
Operating expenses
Research and development	5,113	3,798	13,541	10,830
Sales and marketing	11,942	11,791	37,299	32,702
General and administrative	4,237	4,073	12,790	11,000
Total operating expenses	21,292	19,662	63,630	54,532
Loss from operations	(7,757)	(3,385)	(21,153)	(8,746)
Interest income	83	87	268	170
Other (expense) income, net	(132)	76	(178)	(55)
Loss before income taxes	(7,806)	(3,222)	(21,063)	(8,631)
(Provision for) benefit from income taxes	(85)	120	(225)	8
Net loss	$ (7,891)	$ (3,102)	$ (21,288)	$ (8,623)
Net loss per share
Basic and Diluted	$ (0.31)	$ (0.13)	$ (0.84)	$ (0.35)
Weighted average shares used to compute net loss per share
Basic and Diluted	25,432	24,747	25,243	24,530