Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 93,933	$ 25,721
Restricted cash	465	1,001
Marketable securities		9,373
Accounts receivable, net of allowances of $177 and $107, respectively	7,382	7,946
Prepaid expenses and other current assets	1,103	1,306
Deferred tax assets	2,366	1,414
Total current assets	105,249	46,761
Property and equipment, net	39,717	36,024
Goodwill	25,512	25,512
Other intangible assets, net	9,511	10,992
Deferred tax assets	4,083	7,863
Other assets	4,848	4,891
Total assets	188,920	132,043
Current liabilities:
Accounts payable	4,573	4,596
Accrued expenses and other liabilities	12,759	13,884
Deferred revenue	13,575	10,829
Current portion of capital leases	205	420
Total current liabilities	31,112	29,729
Deferred revenue, net of current portion	27,754	28,149
Long-term portion of capital leases	197
Other liabilities	778	2,181
Total liabilities	59,841	60,059
Commitments and contingencies (Note 11)
Convertible preferred stock:
Total convertible preferred stock		122,969
Stockholders' equity (deficit):
Preferred stock, $0.0001 par value, 5,000 shares authorized, no shares issued and outstanding
Common stock, $0.0001 par value; 100,000 and 34,900 shares authorized, 33,584 and 7,092 shares issued, 33,584 and 5,835 shares outstanding at December 31, 2011 and December 31, 2010, respectively	3
Treasury stock at cost, 1,257 shares		(4,575)
Note receivable from stockholder		(103)
Additional paid-in capital	170,721
Accumulated deficit	(41,842)	(46,504)
Total common stockholders' equity (deficit)	128,882	(51,182)
Non-controlling interests	197	197
Total stockholders' equity (deficit)	129,079	(50,985)
Total liabilities, convertible preferred stock and stockholders' equity (deficit)	188,920	132,043
Series A convertible preferred stock
Convertible preferred stock:
Total convertible preferred stock		22,263
Stockholders' equity (deficit):
Total stockholders' equity (deficit)		22,263
Series A-2 convertible preferred stock
Convertible preferred stock:
Total convertible preferred stock		6,868
Stockholders' equity (deficit):
Total stockholders' equity (deficit)		6,868
Series B convertible preferred stock
Convertible preferred stock:
Total convertible preferred stock		13,948
Stockholders' equity (deficit):
Total stockholders' equity (deficit)		13,948
Series C convertible preferred stock
Convertible preferred stock:
Total convertible preferred stock		79,890
Stockholders' equity (deficit):
Total stockholders' equity (deficit)		$ 79,890