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Fair Value Measurements - Additional Information (Detail) (USD $) | 12 Months Ended |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2013 2010 Warrants | Jun. 30, 2010 2010 Warrants | Sep. 30, 2013 2012 Warrants | Dec. 31, 2012 2012 Warrants | Sep. 30, 2013 2013 Warrants | Jan. 31, 2011 Unidym Inc | Sep. 30, 2013 Unidym Inc | Sep. 30, 2013 Ablaris Therapeutics
Fair Value Measurements Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Non cash consideration received in sale of interest in subsidiary, bonds |  |  |  |  |  |  |  |  | $ 2,500,000 |  |
Bond convertible conversion price per share |  |  |  |  |  |  |  |  | $ 2.00 |  |
Gain from change in value of the derivative asset, net of the derivative liability | 0 |  |  |  |  |  |  |  |  |  |
Short term investments | 9,030,261 | 106,500 |  |  |  |  |  |  |  |  |
Long-term investments | 1,702,153 |  |  |  |  |  |  |  |  |  |
Total investments | 10,732,414 |  |  |  |  |  |  |  |  |  |
Fair value of investments | 10,698,271 |  |  |  |  |  |  |  |  |  |
Bond owed to third party | 0 | 10,646 |  |  |  |  |  |  |  |  |
Gain from change in value of the derivative asset |  |  |  |  |  |  |  |  |  | 250,250 |
Warrants issued to acquire Common Stock |  |  |  |  | 329,649 |  | 912,543 | 833,530 |  |  |
Non-cash gain (loss) from change in fair value of the derivative liability | 5,066,591 |  |  |  |  |  |  |  |  |  | 5,806
Warrants outstanding | 4,402,523 |  |  | 187,313 |  | 415,761 |  | 326,635 |  |  |
Duration of exchange rights | 7 years |  |  |  |  |  |  |  |  |  |
Exchange right convertible conversion ratio for first year |  |  |  |  |  |  |  |  |  |  | 0.06
Exchange right convertible conversion ratio for second year |  |  |  |  |  |  |  |  |  |  | 0.04
Exchange right convertible conversion ratio for third year |  |  |  |  |  |  |  |  |  |  | 0.03
Exchange right convertible conversion ratio for fourth year |  |  |  |  |  |  |  |  |  |  | 0.02
Exchange right convertible conversion ratio for fifth year and beyond |  |  |  |  |  |  |  |  |  |  | 0.01
Number of exchange right sold |  |  |  |  |  |  |  |  |  |  | 675,000
Contingent consideration | $ 1,595,273 | $ 173,621 |  |  |  |  |  |  |  |  |

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