Agreements - Additional Information (Detail) - License Agreement with BioMarin [Member] $ in Millions |
3 Months Ended |
---|---|
Mar. 31, 2020
USD ($)
| |
License Agreement [Line Items] | |
Date on which strategic collaboration is entered into | Oct. 26, 2012 |
Royalty agreement period | 7 years |
Net sales royalty threshold | $ 100 |
Minimum [Member] | |
License Agreement [Line Items] | |
Percentage of royalty on net sales | 7.00% |
Maximum [Member] | |
License Agreement [Line Items] | |
Percentage of royalty on net sales | 10.00% |