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Leases - Components Of Lease Cost (Detail) - USD ($)
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Leases    
Operating lease cost $ 3,162 $ 971
Finance lease cost:    
Amortization of right-of-use assets 46 30
Interest on finance lease liabilities 6 8
Total finance lease cost 52 38
Total lease cost $ 3,214 $ 1,009