License and Development Agreements - Collegium License and Development Agreement - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Jun. 30, 2016	Sep. 30, 2017	Mar. 31, 2017	Jan. 31, 2012
Revenue Recognition, Milestone Method [Line Items]
Non-refundable payment received				$ 30.0
Collegium License and Development Agreement [Member]
Revenue Recognition, Milestone Method [Line Items]
Non-refundable payment received	$ 2.5
Execution term of license agreement	30 days
Payment receivable upon first commercial sale		$ 4.0
Payment receivable related to patent milestone			$ 3.0
Payment receivable on achievement of potential sales milestones		$ 17.0
Royalty payment, term		upper-teen percent royalties payable by Collegium to the Company based on various annual U.S. net sales thresholds, subject to customary adjustments and the royalty sharing arrangements