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
Mar. 31, 2020
Mar. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows from operating leases $ 44 $ 50
Right-of-use assets obtained in exchange for lease obligations:    
Operating leases   $ 455
Weighted Average Remaining Lease Term Operating leases 1 year 11 months 26 days  
Weighted Average Discount Rate Operating leases 9.90% 9.90%