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Commitments and Contingencies - Future Minimum Lease Commitments under Operating and Finance Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finance Leases
Remainder of 2021	$ 34
2022	0
2023	0
2024	0
2025	0
Thereafter	0
Total lease payments	34
Less imputed interest	0
Present value of future minimum lease payments	34
Operating Leases
Remainder of 2021	3,718
2022	4,971
2023	3,724
2024	3,846
2025	3,988
Thereafter	10,256
Total lease payments	30,503
Less imputed interest	8,915
Present value of future minimum lease payments	21,588
Less operating lease liability, current portion	3,126	$ 2,033
Operating lease liability, less current portion	$ 18,462	$ 16,069

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