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Commitments and Contingencies - Summary of Weighted Average Remaining Lease Term and Weighted Average Discount Rate for Operating and Finance Leases (Detail)
Sep. 30, 2019
Commitments And Contingencies Disclosure [Abstract]  
Operating Lease, Weighted average discount rate 8.00%
Operating Lease, Weighted average remaining lease term (years) 8 years 4 months 24 days
Finance Leases, Weighted average discount rate 6.00%
Finance Leases, Weighted average remaining lease term (years) 1 year 3 months 18 days