Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Statement [Abstract]
Total revenue	$ 25,968	$ 20,401	$ 73,965	$ 57,797
Cost of revenue
Product	5,237	4,290	16,138	11,968
Service	3,743	3,861	11,134	10,569
Total cost of revenue	8,980	8,151	27,272	22,537
Gross profit	16,988	12,250	46,693	35,260
Operating expenses
Research and development	3,043	2,379	8,248	6,970
Sales and marketing	8,532	7,542	24,064	20,717
General and administrative	3,745	3,197	10,449	8,278
Total operating expenses	15,320	13,118	42,761	35,965
Income (loss) from operations	1,668	(868)	3,932	(705)
Interest income	60	5	86	13
Interest expense and other finance charges	0	(112)	(74)	(234)
Other income (expense), net	50	132	(1,442)	(1,085)
Income (loss) before income taxes	1,778	(843)	2,502	(2,011)
Provision for income taxes	(41)	(57)	(420)	(231)
Net income (loss)	$ 1,737	$ (900)	$ 2,082	$ (2,242)
Net income (loss) per common share
Basic and diluted	$ 0.07	$ (0.25)	$ 0.04	$ (0.68)
Weighted average common shares - outstanding basic	22,450	3,589	15,973	3,284
Weighted average common shares - outstanding diluted	25,337	3,589	18,751	3,284