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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)
Mar. 31, 2019
Commitments And Contingencies Disclosure [Abstract]  
Operating Lease, Weighted average discount rate 9.00%
Operating Lease, Weighted average remaining lease term (years) 9 years 4 months 24 days
Finance Leases, Weighted average discount rate 5.90%
Finance Leases, Weighted average remaining lease term (years) 1 year 6 months