Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.20.4
Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Taxes Disclosure [Line Items]    
Income tax provision $ 5,000.00 $ 0.00
Increase in valuation allowance 26,500,000  
Unrecognized benefits 0 $ 0
State    
Income Taxes Disclosure [Line Items]    
Research and development credits $ 1,900,000  
Year research and development credits begin to expire 2033  
State    
Income Taxes Disclosure [Line Items]    
Net operating loss carryforwards $ 400,000  
Federal    
Income Taxes Disclosure [Line Items]    
Net operating loss carryforwards $ 198,800,000  
Year net operating loss carryforwards begin to expire 2024  
Operating loss carryforward subject to expire $ 62,800,000  
Operating loss carryforwards not subject to expire 136,000,000.0  
Research and development credits $ 7,600,000  
Year research and development credits begin to expire 2022