Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Presentation of Operating Lease Liability and Right-of-Use Asset (Detail)

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Commitments and Contingencies - Presentation of Operating Lease Liability and Right-of-Use Asset (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]    
Present value of future minimum lease payments $ 3,373  
Operating lease liability, current portion 43 $ 36
Operating lease liability, long-term portion 3,330 3,326
Total operating lease liability 3,373  
Difference between future minimum lease payments and discounted cash flows 2,933  
Operating lease right-of-use asset $ 3,094 $ 3,191