CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net revenue:
Products	$ 56,905	$ 60,057	$ 46,879
Service	17,689	17,220	13,411
Total net revenue	74,594	77,277	60,290
Cost of Revenue:
Products	24,179	26,911	17,545
Service	8,533	8,826	8,433
Total cost of revenue	32,712	35,737	25,978
Gross profit	41,882	41,540	34,312
Operating expenses:
Sales and marketing	27,984	28,664	25,499
Research and development	9,216	8,427	9,141
General and administrative	9,938	11,276	10,104
Total operating expenses	47,138	48,367	44,744
Loss from operations	(5,256)	(6,827)	(10,432)
Interest and other income, net	455	497	614
Loss before income taxes	(4,801)	(6,330)	(9,818)
Income tax (benefit) provision	(54)	218	243
Net Loss	$ (4,747)	$ (6,548)	$ (10,061)
Net loss per share:
Basic and diluted (in dollars per share)	$ (0.33)	$ (0.46)	$ (0.73)
Weighted-average number of shares used in per share calculations:
Basic and diluted (in shares)	14,421	14,089	13,807