Collaborations, Licensing and Other Arrangements - Additional Information (Detail 1) - License and Distribution Agreement - Cipla Ltd - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2018-06-01 $ in Millions	May 31, 2018 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Deferred revenue recognition period	15 years
Anticipated revenue allocation	$ 2.2