Commitments and Contingencies - Additional Information (Detail)	1 Months Ended			9 Months Ended
	Apr. 30, 2017 USD ($) ft²	Sep. 30, 2012	Aug. 31, 2012 USD ($) shares	Mar. 31, 2017 USD ($) ft²	Jun. 30, 2016 USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Lease expiration month and year				2017-06
Lease arrangement rent area, square feet | ft²				8,800
Lease rental rate				$ 29,000
Future minimum payment, remainder of fiscal year				86,000
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				$ 700,000
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 month and year	2020-05
Lease arrangement rent area, square feet | ft²	13,700
Lease rental rate	$ 44,000
Lease commencement date	Jul. 01, 2017
Phase Three Clinical Trial
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Common stock value			$ 500,000