Commitments and Contingencies - Summary of Commitments and Contingencies (Detail)	Mar. 31, 2020 USD ($)
Commitment And Contingencies [Line Items]
2020	$ 3,192,000
2021	1,926,000
2022	466,000
2023	13,000
2024	0
Thereafter	0
Total	5,597,000
Key Clinical Research Trial Obligations
Commitment And Contingencies [Line Items]
2020	2,193,000
2022	0
2023	0
2024	0
Thereafter	0
Total	2,193,000
BLA consulting services
Commitment And Contingencies [Line Items]
2021	1,143,000
2022	0
2023	0
2024	0
Thereafter	0
Total	1,143,000
Statistical analysis and programming consulting services
Commitment And Contingencies [Line Items]
2020	350,000
2022	0
2023	0
2024	0
Thereafter	0
Total	350,000
Employment Agreements
Commitment And Contingencies [Line Items]
2020	649,000
2021	783,000
2022	466,000
2023	13,000
2024	0
Thereafter	0
Total	$ 1,911,000

Commitment And Contingencies [Line Items]

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