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Commitments and Contingencies - Summary of Quantitative Information Associated with Amounts Recognized in Unaudited Condensed Consolidated Financial Statements for Lease (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 01, 2018
Mar. 31, 2021
Mar. 31, 2020
Commitments And Contingencies Disclosure [Abstract]      
Operating lease cost   $ 166 $ 166
Variable lease cost   (2) 21
Total operating lease expense   164 187
Total lease payments $ 7,300 $ 170 $ 167
Remaining Lease term (years)   8 years 4 months 2 days 9 years 4 months 2 days
Discount rate   15.00% 15.00%