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Organization and Basis of Presentation - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 119 Months Ended 1 Months Ended
Jan. 31, 2013
Dec. 31, 2012
Aug. 10, 2012
Mar. 31, 2013
Mar. 31, 2013
Mar. 31, 2012
Sep. 30, 2012
Mar. 31, 2013
Sep. 30, 2011
Apr. 29, 2013
Subsequent Events [Member]
Apr. 29, 2013
Subsequent Events [Member]
Series B convertible preferred stock [Member]
Mar. 31, 2013
Subsequently adjusted [Member]
Mar. 31, 2013
Warrants Issued [Member]
Schedule of Investments [Line Items]                          
Cash for fund operations       $ 3,313,483 $ 3,313,483 $ 3,595,112 $ 3,377,288 $ 3,313,483 $ 7,507,389        
Cash from issuance of equity 3,300,000 3,900,000   1,200,000 7,200,000                
Other cash collections         1,600,000                
Cash outflow from continuing operations         (8,304,350) (6,862,442)   (84,182,146)          
Drawing Limit under Equity Line Facility                 15,000,000        
Minimum stock price required to maintain under equity line facility   $ 2.00                      
Proceeds from equity line facility             1,000,000            
Shares issued under public offering 1,667,051 1,800,000   1,170,000                  
Shares issued under public offering, price per share $ 2.12 $ 2.26                      
Unit sold, description Each unit consisted of one share of common stock and a warrant to purchase Each unit consisted of one share of Common Stock and a warrant to purchase                      
Warrant to purchase share of Common Stock 0.5 0.5                      
Exercise price of warrant       2.14 2.14     2.14       1.83 2.12
Issuance and sold of Common Stock     2,260,869             14,262,553 9,900    
Sale of stock, price per share     $ 2.76             $ 1.83 $ 1,000.00    
Issuance and sold of Preferred Stock                     9,900    
Conversion price                     $ 1.83    
Aggregate purchase price on issuance of common stock to be received                   $ 36,000,472      
Reverse stock split         Company effected a 1 for 10 reverse stock split