Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Summary of Quantitative Information Associated with Amounts Recognized in Condensed Consolidated Financial Statements for Lease (Detail)

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Commitments and Contingencies - Summary of Quantitative Information Associated with Amounts Recognized in Condensed Consolidated Financial Statements for Lease (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 01, 2018
Dec. 31, 2020
Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]      
Operating lease cost   $ 664 $ 664
Variable lease cost   51 41
Total operating lease expense   715 705
Total lease payments $ 7,300 $ 507 $ 497
Remaining Lease term (years)   8 years 7 months 2 days 9 years 7 months 2 days
Discount rate   15.00% 15.00%