Subsequent Events - Additional Information (Detail) - A&R JDCA [Member] - USD ($) $ in Millions	Jul. 01, 2021	Apr. 16, 2021
Forecast [Member]
Subsequent Event [Line Items]
Percentage of net profits and net losses	40.00%
Forecast [Member] | Vertex Pharmaceuticals Inc [Member]
Subsequent Event [Line Items]
Percentage of net profits and net losses	60.00%
Subsequent Event [Member] | Vertex Pharmaceuticals Inc [Member]
Subsequent Event [Line Items]
Up-front payment receivable		$ 900
Milestone payment receivable upon receipt of first marketing approval		$ 200