Subsequent Events - Additional Information (Detail) - Research Facility in Madison $ in Millions		3 Months Ended
	Jan. 08, 2016 USD ($) ft² Option	Dec. 31, 2015
Subsequent Event [Line Items]
Operating lease available for occupancy year		late 2016
Subsequent Event
Subsequent Event [Line Items]
Operating lease initial term	10 years
Area of operating leased property | ft²	60,000
Operating lease commencement date	Jan. 01, 2016
Operating lease payments during initial term	$ 15.4
Estimated payment for real estate taxes, operating expenses and common area maintenance expenses	0.9
Estimated payments for leasehold improvements net of tenant improvement allowances	$ 7.3
Number of renewal options | Option	2
Operating leases renewal term	5 years