Quarterly report pursuant to Section 13 or 15(d)

Leases - Schedule of Maturities of Lease Liabilities Under Operating and Finance Leases (Detail)

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Leases - Schedule of Maturities of Lease Liabilities Under Operating and Finance Leases (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Lessee Lease [Line Items]    
Operating leases, Remaining 2019 $ 650  
Operating leases, 2020 2,867  
Operating leases, 2021 2,740  
Operating leases, 2022 2,611  
Operating leases, 2023 2,685  
Operating leases, Thereafter 14,477  
Operating leases, Total minimum payments 26,030  
Less: amount representing interest (10,338)  
Present value of lease liabilities 15,692  
Other current liabilities $ 1,160  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesCurrent  
Operating lease liabilities $ 14,532 $ 0
Total 15,692  
Finance leases, Remaining 2019 151  
Finance leases, 2020 236 962
Finance leases, 2021 30 991
Finance leases, 2022 0 1,020
Finance leases, 2023 0 1,051
Finance leases, Thereafter 0 11,458
Finance leases, Total minimum payments 417 $ 16,416
Less: amount representing interest (24)  
Present value of lease liabilities 393  
Other current liabilities $ 308  
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesCurrent  
Other long-term liabilities $ 85  
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesNoncurrent  
Total $ 393  
Other Long-term Liabilities    
Lessee Lease [Line Items]    
Operating lease liabilities $ 0