Annual report pursuant to Section 13 and 15(d)

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

v3.20.1
Income Taxes - Components of Company's Deferred Tax Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Deferred tax assets    
Net operating loss carryovers $ 35,901 $ 31,135
Research and development tax credits 8,312 8,641
Intangibles 130 379
Stock options 438 2,255
Compensation 47 452
Deferred revenue 0 2,642
Other 88 62
Total gross deferred tax assets 44,916 45,566
Deferred tax liabilities    
Right-of-use asset 46 0
Total net deferred tax assets 44,870 45,566
Less valuation allowance (44,870) (45,566)
Net deferred tax assets $ 0 $ 0