Commitments - Summary of Operating and Financing Lease Obligation (Detail) $ in Thousands	Dec. 31, 2019 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2020	$ 616
2021	106
Total undiscounted lease payments	722
Less: Amount associated with discounting	(53)
Net operating lease liabilities	669
2020	8
2021	2
Total undiscounted lease payments	10
Less: Amount associated with discounting	(1)
Net finance lease liabilities	$ 9