Balance Sheet Components (Details 2) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accrued expenses and other current liabilities
Accrued bonuses, commissions and wages	$ 10,138	$ 10,553
Accrued ESPP	872	2,324
Accrued vacation	3,753	2,972
Accrued marketing expenses	2,016	1,313
Accrued other	5,227	3,529
Total	$ 22,006	$ 20,691