Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Net operating loss carryforwards	$ 13,795	$ 18,668
Tax credits	12,625	2,223
Stock-based compensation	4,510	2,177
Deferred revenue	61,704
Accruals and reserves	3,902	1,318
Gross deferred tax assets	96,536	24,386
Valuation allowance	(84,528)	(24,072)
Total deferred tax assets	12,008	314
Deferred tax liabilities:
Tangible assets	(4,543)	(314)
Intangible assets	(7,015)	(7,350)
Total deferred tax liabilities	(11,558)	(7,664)
Net deferred tax assets	$ 450
Net deferred tax liabilities		$ (7,350)