Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Components of Deferred Tax Assets (Details)

v3.19.1
Income Taxes - Schedule of Components of Deferred Tax Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Deferred tax assets:    
Net operating loss carryforwards $ 29,296 $ 23,820
Research and development credits 15,680 11,244
Deferred revenue 3,027 3,004
Accruals and other 2,342 1,103
Fixed asset basis 363  
Total deferred tax assets 50,708 39,171
Valuation allowance (50,708) (39,135)
Net deferred tax assets   36
Deferred tax liability   (36)
Net deferred tax assets $ 0 $ 0