Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Company's Deferred Tax Assets (Detail)

v3.6.0.2
Income Taxes - Schedule of Company's Deferred Tax Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets:    
Net operating loss carryforwards $ 114,222 $ 93,824
Research and development tax credit carryforwards 12,518 9,979
Stock-based compensation 8,565 6,853
Deferred revenue 2,918 4,479
Other 3,492 2,807
Total deferred tax asset 141,715 117,942
Valuation allowance $ 141,715 $ 117,942