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Investment in Subsidiaries - Additional Information (Detail) (USD $) | 9 Months Ended | 12 Months Ended |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Sep. 30, 2011 | Jan. 31, 2011 Preferred Stock B and C | Jun. 30, 2013 Calando Pharmaceuticals, Inc. | Jan. 31, 2011 Calando Pharmaceuticals, Inc. | Sep. 30, 2011 Ablaris Therapeutics, Inc. | Jun. 30, 2013 Ablaris Therapeutics, Inc. | Jun. 30, 2013 Leonardo Biosystems, Inc.
Schedule Of Investments [Line Items] |  |  |  |  |  |  |  |
Ownership percentage in subsidiary | 100.00% |  |  |  |  |  |  |
Investment in preferred stock |  |  | $ 9,100,000 |  |  | $ 1,300,000 |  |
Cash investment in subsidiary |  |  |  |  | 1,000,000 |  |  |
Investment in subsidiary through conversion of intercompany debt |  |  |  |  | 8,100,000 |  |  |
Amount owed by subsidiary |  |  |  | 3,900,000 |  |  | 1,300,000 | 858,000
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% |
Aggregate purchase price of preferred shares |  | 1,618,509 |  |  |  | 2,900,000 |  |
Investment in preferred stock by outsider |  |  |  |  |  | $ 1,600,000 |  |

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