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Acquisitions - Summary of Estimated Fair Values at Date of Acquisition (Detail) (USD $)	6 Months Ended
	Mar. 31, 2013
Roche [Member]
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 [Member]
Business Acquisition [Line Items]
Current assets	29,332
In-process R&D	2,172,387
Current liabilities	(113,033)
Total purchase consideration	$ 2,088,686

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The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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