Commitments and Contingencies - Additional Information (Detail)		1 Months Ended			9 Months Ended
	Aug. 22, 2012 shares	Apr. 30, 2016	Sep. 30, 2012	Aug. 31, 2012 USD ($)	Mar. 31, 2016 USD ($) ft²	Jun. 30, 2015 USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Lease expiration month and year					2016-06
Lease arrangement rent area, square feet | ft²					8,800
Lease rental rate					$ 27,000
Future minimum payment next year					81,000
Issuance of common stock to acquire intellectual property and technology rights				$ 500,000
Issuance of common stock to purchase asset, shares | shares	195,756
Future aggregate milestone payments				75,200,000
First milestone payment				200,000
Common stock value					0	$ 0
Accrued potential future payments					$ 250,000
Percentage of Purchase Requirement			100.00%
License and supply agreement notice period			90 days
Subsequent Event
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Lease expiration date		Jun. 30, 2017
Phase Three Clinical Trial
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Common stock value				$ 500,000