Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 112,853	$ 112,644
Accounts receivable, net	41,885	37,867
Prepaid expenses and other current assets	7,487	5,756
Total current assets	162,225	156,267
Property and equipment, net	20,995	16,832
Goodwill	29,201	29,201
Intangible assets, net	6,309	7,076
Other assets	2,060	1,035
Total assets	220,790	210,411
Current liabilities:
Accounts payable	5,835	3,901
Accrued expenses and other current liabilities	22,006	20,691
Deferred revenue	81,868	62,945
Current portion of credit facility	2,473	2,719
Total current liabilities	112,182	90,256
Credit facility, net of current portion	870	2,653
Deferred revenue - long-term	267
Other liabilities	4,275	3,526
Total liabilities	$ 117,594	$ 96,435
Commitments and contingencies (Note 8)
Redeemable non-controlling interests (Note 2 and Note 6)	$ 3,541	$ 800
Stockholders' equity:
Common stock	4	4
Additional paid-in capital	335,743	297,420
Accumulated other comprehensive loss	(390)	(350)
Accumulated deficit	(235,702)	(183,898)
Total stockholders' equity	99,655	113,176
Total liabilities, redeemable non-controlling interests and stockholders' equity	$ 220,790	$ 210,411