Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

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Commitments and Contingencies - Additional Information (Detail)
3 Months Ended
Mar. 01, 2018
USD ($)
ft²
Mar. 31, 2020
USD ($)
Commitment And Contingencies [Line Items]    
Long-term lease agreement, area of office space | ft² 19,275  
Lease term 11 years  
Total lease payments $ 7,300,000 $ 167,000
Lessee, operating lease, existence of option to extend true  
Renewal term 5 years  
Renewal term, description The Company has the option to renew for two consecutive five-year periods from the end of the first term and the Company is not reasonably certain that the option to renew the Lease will be exercised. Under the Lease, the Company furnished a security deposit in the form of a standby letter of credit in the amount of $0.3 million, which was reduced by fifty-five thousand dollars on the first anniversary of the commencement date. The security deposit will continue to be reduced by fifty-five thousand dollars every two years on the commencement date anniversary for eight years.  
Security deposit in the form of a standby letter of credit $ 300,000  
Decrease in security deposit $ 55,000  
Maximum    
Commitment And Contingencies [Line Items]    
Milestone payments from the Company   $ 19,000,000