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Investment in Subsidiaries - Additional Information (Detail) (USD $) | 12 Months Ended |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2011 | Sep. 30, 2010 | Nov. 26, 2008 | Sep. 30, 2013 Calando Pharmaceuticals Inc | Jun. 23, 2009 Calando Pharmaceuticals Inc | Nov. 26, 2008 Calando Pharmaceuticals Inc | Apr. 17, 2008 Calando Pharmaceuticals Inc | Sep. 30, 2011 Ablaris Therapeutics | Sep. 30, 2013 Ablaris Therapeutics | Sep. 30, 2013 Leonardo Biosystems, Inc.
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in subsidiary | 100.00% |  |  |  |  |  |  |  |  |  |
Aggregate investment in subsidiary through equity and debt |  |  |  |  |  |  |  | $ 23,200,000 |  |  |
Unsecured Convertible Promissory Note Agreements |  |  |  | 2,500,000 |  |  | 2,500,000 |  |  |  |
Investment in Notes offering |  |  |  | 200,000 |  |  | 200,000 |  |  |  |
Additional investment in Notes offering |  |  |  |  |  |  | 600,000 |  |  |  |
Principal amount of note which not converted into shares |  |  |  |  |  | 500,000 |  |  |  |  |
Conversion of Notes and accrued interest into share |  |  |  |  |  | 2,950 |  |  |  |  |
Amount owed by subsidiary |  |  |  |  | 4,300,000 |  |  |  |  |  | 1,100,000
Stated percentage of notes and advances |  |  |  |  | 8.00% |  |  |  |  |  |
Percentage of outstanding shares |  |  |  |  | 79.00% |  |  |  |  | 64.00% | 3.00%
Percentage of investment ownership |  |  |  |  | 76.00% |  |  |  |  | 64.00% |
Investment in preferred stock |  |  |  |  |  |  |  |  | 1,300,000 |  |
Issuance of preferred stock in subsidiary |  | 1,618,509 | 300,000 |  |  |  |  |  | 2,900,000 |  |
Investment in preferred stock by outsider |  |  |  |  |  |  |  |  | $ 1,600,000 |  |

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