Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues
Revenues	$ 39,877	$ 32,302	$ 77,370	$ 62,658
Cost of revenues	8,157	7,175	16,121	14,021
Gross profit	31,720	25,127	61,249	48,637
Operating expenses:
Research and development	7,205	6,411	14,355	12,815
Sales and marketing	12,776	11,845	24,219	24,337
General and administrative	6,427	5,081	12,443	9,956
Total operating expenses	26,408	23,337	51,017	47,108
Income from operations	5,312	1,790	10,232	1,529
Other income (expense), net:
Interest expense	(4)	(3)	(4)	(7)
Interest income	132	130	233	238
Other income (expense), net	0	(86)	(178)	(178)
Total other income, net	128	41	51	53
Income before income taxes	5,440	1,831	10,283	1,582
Provision for income taxes	2,124	174	3,965	356
Net income	$ 3,316	$ 1,657	$ 6,318	$ 1,226
Net income per share:
Basic (USD per share)	$ 0.10	$ 0.05	$ 0.19	$ 0.04
Diluted (USD per share)	$ 0.09	$ 0.04	$ 0.16	$ 0.03
Weighted average shares used in computing net income per share:
Basic (shares)	34,003	32,818	33,889	32,668
Diluted (shares)	38,475	36,839	38,363	36,966