Subsequent Event - Additional Information (Detail) - Subsequent Event [Member] - License Agreement [Member] - Ferring International Center S.A. and its Affiliates [Member]	Oct. 01, 2020 USD ($)
Subsequent Event [Line Items]
Upfront payment paid	$ 5,000,000.0
Additional upfront payment made at one year from execution	2,500,000
Maximum [Member]
Subsequent Event [Line Items]
Tiered royalties and additional commercial milestone payments	$ 17,500,000