Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 65,482	$ 68,088
Restricted cash	37	45
Short-term investments	22,795
Accounts receivable	47,334	44,860
Current portion of deferred commissions	10,219	6,087
Prepaid expenses and other current assets	4,671	9,883
Current portion of deferred tax assets	1,544	1,544
Total current assets	152,082	130,507
Deferred commissions, less current portion	8,151	4,597
Property and equipment, net	35,452	20,695
Deferred income taxes, noncurrent	174
Other assets	4,613	524
Total assets	200,472	156,323
Current liabilities:
Accounts payable	8,550	9,411
Accrued expenses and other current liabilities	29,658	25,608
Current portion of deferred revenue	113,167	91,087
Current portion of deferred rent	430	455
Total current liabilities	151,805	126,561
Deferred revenue, less current portion	17,902	13,549
Deferred rent, less current portion	2,902	2,935
Other long-term liabilities	2,510	2,532
Total liabilities	175,119	145,577
Convertible preferred stock	68,481	68,172
Stockholders' deficit:
Common stock	29	22
Additional paid-in capital	39,061	9,793
Accumulated other comprehensive income	286	899
Accumulated deficit	(82,504)	(68,140)
Total stockholders' deficit	(43,128)	(57,426)
Total liabilities, convertible preferred stock and stockholders' deficit	$ 200,472	$ 156,323