Significant Agreements and Contracts - Additional Information (Details) (USD $)
3 Months Ended 1 Months Ended 6 Months Ended 0 Months Ended 1 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jul. 31, 2012
Jul. 31, 2010
Jun. 30, 2012
Aug. 31, 2014
May 31, 2013
Mar. 31, 2015
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                
Contract research $ 2,076,580 $ 2,983,830            
Optimer Pharmaceuticals Inc | Collaborative Arrangement                
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                
Common shares issued to Optimer in exchange for license 125,646              
Fair value of common shares issued to Optimer 190,418              
Milestone payment paid to Optimer     1,000,000 500,000        
Aggregate amount of milestone payment 27,500,000              
Number of products required to be developed through FDA approval 4              
Royalty payment based on annual net sales description The Company will also pay tiered mid-single-digit royalties based on the amount of annual net sales of licensed products outside the Association of Southeast Asian Nations (“ASEAN”) countries, which royalties are subject to reduction in the event additional licenses are obtained from third parties in order to practice the Company’s rights under the Optimer Agreement and/or the Company is required to grant a compulsory license to a third party.              
The Scripps Research Institute                
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                
Royalty payment based on annual net sales description Under the terms of the agreement, the Company must pay TSRI low single-digit percentage royalties on the net sales of the products covered by the TSRI patents for the life of the TSRI patents, a low single-digit percentage of non-royalty sublicensing revenue received with respect to countries in the nonexclusive territory and a mid-single-digit percentage of sublicensing revenue received with respect to countries in the exclusive territory, with the sublicensing revenue royalty in the exclusive territory and the sales royalties subject to certain reductions under certain circumstances.              
Non refundable license issue fee         350,000      
Eligible milestone payment 1,100,000              
Sublicense fees paid 200,000              
The Scripps Research Institute | First Three Years                
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                
Annual maintenance fees 50,000              
The Scripps Research Institute | Fourth Through Six Years                
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                
Annual maintenance fees 85,000              
Biomedical Advanced Research and Development Authority                
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                
Value of cost plus fixed fee development contract with base performance segment 17,700,000              
Number of option work segments 4              
Cumulative value of cost plus fixed fee development contract with base performance segment of four option work segments 58,000,000              
Number of options under cost plus fixed fee arrangements 3              
Number of options under cost sharing arrangement 1              
Aggregate milestone payments receivable under license agreement May 31, 2013              
Estimated period of performance for the base performance segment ending date Nov. 30, 2015              
Extended estimated period of performance for the base performance segment May 31, 2018              
Contract research 15,200,000              
Biomedical Advanced Research and Development Authority | Second Option Work                
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                
Value of cost plus fixed fee development contract with base performance segment 16,000,000              
Aggregate milestone payments receivable under license agreement Nov. 30, 2014              
Estimated period of performance for the base performance segment ending date Nov. 30, 2016              
Toyama Chemical                
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                
Contract research 3,200,000              
Deferred revenue 11,400,000           10,000,000 11,400,000
Aggregate milestone payments             60,000,000  
Milestone payment amount received           10,000,000    
Milestone payment recognized as revenue           $ 4,300,000 $ 4,300,000 $ 10,000,000
Number of deliverables under license agreement 6