Quarterly report pursuant to Section 13 or 15(d)

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

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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 6 Months Ended
Mar. 01, 2018
Jun. 30, 2020
Jun. 30, 2020
Commitments And Contingencies Disclosure [Abstract]      
Operating lease cost   $ 166 $ 332
Variable lease cost   6 27
Total operating lease expense   172 359
Total lease payments $ 7,300 $ 56 $ 223
Remaining Lease term (years)   9 years 1 month 2 days 9 years 1 month 2 days
Discount rate   15.00% 15.00%