Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements of Operations [Abstract]
Revenues	$ 114,874	$ 96,760	$ 84,579
Cost of revenues	21,857	18,932	15,461
Gross profit	93,017	77,828	69,118
Operating expenses:
Sales and marketing	57,543	49,620	41,123
Research and development	7,561	5,891	4,675
General and administrative	30,129	23,587	21,018
Amortization of intangible assets	2,021	2,298	1,926
Total operating expenses	97,254	81,396	68,742
Income (loss) from operations	(4,237)	(3,568)	376
Other income (expense):
Interest and other income	317	224	485
Interest and other expense	(38)	(153)	(31)
Total other income	279	71	454
Income (loss) before provision for income taxes	(3,958)	(3,497)	830
Provision for income taxes	10,619	178	2,854
Net loss	$ (14,577)	$ (3,675)	$ (2,024)
Net loss per share:
Basic	$ (0.78)	$ (0.21)	$ (0.11)
Diluted	$ (0.78)	$ (0.21)	$ (0.11)
Weighted average shares outstanding used in computing per share amounts:
Basic	18,743,305	17,921,238	18,077,616
Diluted	18,743,305	17,921,238	18,077,616