CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (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	$ 50,196	$ 46,839	$ 151,659	$ 143,535
Cost of revenues	25,532	16,844	61,303	50,773
Amortization of acquired intangible assets	432	362	1,289	1,114
Gross profit	24,232	29,633	89,067	91,648
Operating expenses:
Research and development	3,028	3,216	10,376	11,003
Sales and marketing	18,149	17,778	55,804	55,843
General and administrative	11,443	9,758	34,018	28,714
Amortization of acquired intangible assets	741	491	2,255	1,574
Transaction related expenses	0	364	0	364
Restructuring Charges	4,045	0	4,045	0
Total operating expenses	37,406	31,607	106,498	97,498
Operating loss	(13,174)	(1,974)	(17,431)	(5,850)
Other income (expense):
Interest income	2	33	4	108
Interest expense	(1,048)	(774)	(2,670)	(5,060)
Other income (expense), net	210	208	(840)	(61)
Total other income (expense)	(836)	(533)	(3,506)	(5,013)
Loss from continuing operations before taxes	(14,010)	(2,507)	(20,937)	(10,863)
Income tax provision (benefit)	500	(38)	883	(759)
Net loss	$ (14,510)	$ (2,469)	$ (21,820)	$ (10,104)
Net loss per common share:
Basic and diluted net loss per share, in dollars per share	$ (0.15)	$ (0.03)	$ (0.23)	$ (0.11)
Weighted-average shares used in computing net loss per share:
Basic and diluted, in shares	96,381	89,503	96,046	89,222