Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Assets Relating to Finance Leases Included in Equipment (Detail)

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Commitments and Contingencies - Assets Relating to Finance Leases Included in Equipment (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Commitments And Contingencies [Line Items]    
Finance lease assets, gross $ 276 $ 254
Less: Accumulated depreciation and amortization (158) (163)
Finance lease assets, net 276 254
Furniture and Equipment    
Commitments And Contingencies [Line Items]    
Finance lease assets, gross $ 434 $ 417