Acquisitions - Summary of Estimated Fair Values at Date of Acquisition (Detail) (USD $)	9 Months Ended
	Jun. 30, 2013
Roche
Business Acquisition [Line Items]
Current assets	$ 432,709
Property and equipment	7,215,206
Intangible assets	1,174,935
Other noncurrent assets	6,264
Current liabilities	(414,122)
Noncurrent liabilities	(1,570,072)
Gain on purchase	(1,576,106)
Total purchase consideration	5,268,814
Alvos acquisition
Business Acquisition [Line Items]
Current assets	29,332
Current liabilities	(113,033)
Total purchase consideration	2,088,686
In-process R&D	$ 2,172,387