Acquisitions - Summary of Purchase Consideration (Detail) - USD ($)		1 Months Ended	3 Months Ended	9 Months Ended
	Mar. 03, 2015	Apr. 30, 2015	Dec. 31, 2014	Jun. 30, 2015
Asset Acquisition [Line Items]
Cash Paid				$ 10,000,000
Novartis
Asset Acquisition [Line Items]
Cash Paid	$ 10,000,000	$ 3,000,000	$ 7,000,000	$ 10,000,000
Value of Shares Issued	25,000,000
Total purchase consideration	$ 35,000,000