CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Revenues	$ 27,008	$ 20,267	$ 76,418	$ 54,622
Cost of revenues	8,249	5,945	23,258	15,236
Gross profit	18,759	14,322	53,160	39,386
Operating expenses
Sales and marketing	10,291	7,840	29,163	21,259
Research and development	2,806	2,088	7,966	5,650
General and administrative	4,284	3,726	12,542	10,079
Amortization of intangible assets	1,007	530	2,441	1,050
Total operating expenses	18,388	14,184	52,112	38,038
Income from operations	371	138	1,048	1,348
Other income (expense)
Interest expense		(27)		(27)
Interest income	31	6	76	34
Other income (expense)	37	(67)	(95)	(170)
Total other income (expense), net	68	(88)	(19)	(163)
Income before income taxes	439	50	1,029	1,185
Income tax (expense) benefit	(169)	124	(272)	(329)
Net income	$ 270	$ 174	$ 757	$ 856
Net income per share
Basic	$ 0.02	$ 0.01	$ 0.05	$ 0.07
Diluted	$ 0.02	$ 0.01	$ 0.05	$ 0.06
Weighted average common shares used to compute net income per share
Basic	15,223	13,042	15,064	12,500
Diluted	15,986	13,894	15,781	13,373