CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues	$ 196,278	$ 197,711	$ 171,610
Cost of revenues	70,761	79,168	57,657
Amortization of acquired intangible assets	1,749	1,613	1,136
Gross profit	123,768	116,930	112,817
Operating expenses:
Research and development	14,886	16,888	16,431
In-process research and development	341		2,967
Sales and marketing	75,177	75,189	66,542
General and administrative	39,939	36,367	31,078
Amortization of acquired intangible assets	2,180	2,152	1,535
Transaction related expenses	1,082		3,671
Restructuring expenses	0	1,050	2,382
Litigation settlement		9,800
Total operating expenses	133,605	141,446	124,606
Operating loss	(9,837)	(24,516)	(11,789)
Other income (expense):
Interest income	118	148	81
Interest expense	(6,105)	(3,027)	(5,946)
Other income (expense), net	(794)	707	1,167
Total other income (expense)	(6,781)	(2,172)	(4,698)
Loss from continuing operations before taxes	(16,618)	(26,688)	(16,487)
Income tax benefit	(1,159)	(4,507)	(2,054)
Loss from continuing operations	(15,459)	(22,181)	(14,433)
Income from discontinued operations, net of tax			78
Net loss	$ (15,459)	$ (22,181)	$ (14,355)
Net loss per common share:
Basic and diluted net loss per share from continuing operations	$ (0.17)	$ (0.25)	$ (0.18)
Basic and diluted net income per share from discontinued operations
Basic and diluted	$ (0.17)	$ (0.25)	$ (0.18)
Weighted-average shares used in computing net loss per share:
Basic and diluted	90,218	88,798	78,590