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Acquisitions - Additional Information (Detail) (USD $)
 6 Months Ended 6 Months Ended 6 Months Ended
Mar. 31, 2013
Sep. 30, 2012
Mar. 31, 2013
Roche [Member]
Oct. 21, 2011
Roche [Member]
Mar. 31, 2013
Roche [Member]
Minimum [Member]
Mar. 31, 2013
Roche [Member]
Maximum [Member]
Mar. 31, 2013
Alvos acquisition [Member]
Business Acquisition [Line Items]              
Issue of promissory note to Roche     $ 50,000 $ 50,000      
Issue of Common Stock     901,702       315,457
Issuance of additional shares of Common Stock     239,894        
Applicable out-license term     90 days        
Percentage of royalty liability     3.00%        
Obligation to pay royalties Later of (i) the expiration of the last to expire patent right related to such product candidate that was transferred in the Transaction and (ii) ten years after the first commercial sale of such product candidate.            
Cash payments to Roche         2,500,000    
Cash payments to Roche           6,000,000  
Net present value of contingent consideration 84,935            
Gain on purchase     1,576,106        
Issue of additional shares of Common Stock, Value             23,500,000
Contingent consideration $ 173,621 $ 173,621 $ 84,935       $ 88,686