Annual report pursuant to Section 13 and 15(d)

Provision for Income Taxes - Additional Information (Detail)

v3.20.4
Provision for Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Taxes Disclosure [Line Items]    
Operating loss carryforwards, limitations on use Net operating loss carryforwards generated after January 1, 2018 may be carried forward indefinitely, subject to the 80% taxable income limitation on the utilization of the carryforwards.  
Research and development credit carry forward $ 3,193 $ 710
Open tax year 2016  
Unrecognized tax benefits $ 720 $ 0
Unrecognized tax benefits if recognized 655  
Federal [Member]    
Income Taxes Disclosure [Line Items]    
Operating loss carry forward $ 186,324  
Operating loss carry forwards expiration year 2034  
Research and development credit carry forward $ 2,421  
Research and development credit expiration year 2036  
State [Member]    
Income Taxes Disclosure [Line Items]    
Operating loss carry forward $ 87,251  
Operating loss carry forwards expiration year 2021  
Research and development credit carry forward $ 1,807