Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Summary of Other Information Related to Leases (Detail)

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Commitments and Contingencies - Summary of Other Information Related to Leases (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:        
Operating cash flows from operating leases $ 46 $ 41 $ 90 $ 91
Right-of-use assets obtained in exchange for lease obligations:        
Operating leases       $ 455
Weighted Average Remaining Lease Term Operating leases 1 year 10 months 2 days 2 years 6 months 18 days 1 year 10 months 2 days 2 years 6 months 18 days
Weighted Average Discount Rate Operating leases 9.90% 9.90% 9.90% 9.90%