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Leases - Summary Of Lease Related Expenses (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Leases [Abstract]        
Operating lease expense [1] $ 533 $ 588 $ 1,649 $ 1,762
Amortization of right-of-use assets 12 20 51 60
Interest on lease liabilities 1 2 3 6
Total finance lease expense $ 13 $ 22 $ 54 $ 66
[1] Includes short-term lease costs of $275 and $777 for the three months ended September 30, 2020 and 2019, and $315 and $943 for the nine months ended September 30, 2020 and 2019, respectively.