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Commitments and Contingencies - Schedule of Future Minimum Office And Vehicle Lease Payments (Detail) - office and vehicle - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Commitments And Contingencies [Line Items]    
Remainder of fiscal year $ 740  
Year 1 1,499 $ 1,470
Year 2 1,241 1,499
Year 3 88 1,241
Year 4   88
Total $ 3,568 $ 4,298