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Stockholders' Equity (Details Textual) (USD $)
 9 Months Ended 9 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Sep. 30, 2011
Jun. 30, 2012
Stock Option [Member]
May 31, 2011
Common Stock [Member]
Dec. 31, 2010
Common Stock [Member]
May 31, 2011
Private placement [Member]
Common Stock [Member]
Oct. 31, 2010
Private placement [Member]
Common Stock [Member]
Jun. 30, 2012
Restricted Stock [Member]
Jun. 30, 2011
Restricted Stock [Member]
Jun. 30, 2012
Restricted Stock [Member]
Jun. 30, 2011
Restricted Stock [Member]
Feb. 22, 2012
Restricted Stock [Member]
Mar. 15, 2011
Restricted Stock [Member]
Jan. 31, 2011
Restricted Stock [Member]
Jun. 30, 2012
Warrant [Member]
Dec. 31, 2009
Warrant [Member]
May 31, 2005
Warrant [Member]
Jun. 30, 2011
Warrant [Member]
Minimum [Member]
Jun. 30, 2011
Warrant [Member]
Maximum [Member]
Dec. 31, 2009
Warrant [Member]
Convertible debentures [Member]
Jun. 30, 2012
2012 Incentive Plan [Member]
Jun. 30, 2012
2012 Incentive Plan [Member]
Stock Option [Member]
Stockholders' Equity (Textual) [Abstract]                                              
Unrecognized compensation expense related to stock options                 $ 2,608,160   $ 2,608,160                       $ 9,263,367
Restricted stock unit awards issued weighted-average recognition period                     3 years 8 months 12 days                     3 years 6 months  
Common stock sold to investors 25,923,793   24,144,366   2,857,143     500,000         180,835 300,000       321,428     337,501    
Common stock per share value $ 0.001   $ 0.001   $ 5.25     $ 1.50         $ 10.06 $ 5.12       $ 0.70     $ 0.91    
Proceeds from issuance of common stock 0 14,595,367     15,000,000     750,000                              
Legal fees in connection with private placement             80,000                                
Common stock reserved for issuance of restricted stock units                             1,000,000                
Warrants exercised expiration period                                     Feb. 01, 2012 May 01, 2012      
Common stock exercised                                 330,834            
Common stock outstanding 25,923,793   24,144,366                         6,667              
Warrants expiration period                               2014-12              
Common stock reserved for issuance under the 2012 Plan                                           2,000,000  
Weighted-average fair value of options granted                                           $ 6.33  
Common stock issued upon the conversion of outstanding convertible debentures           1,418,573                                  
Cash compensation to placement agent fees         1,050,000                                    
Placement agent out-of-pocket expenses reimbursed amount         25,000                                    
Net proceeds from private placement         13,845,000                                    
Total intrinsic value of options exercised       14,028,720                                      
Options outstanding 3,600,865   4,553,904 3,600,865                                      
Weighted-average remaining contractual term, outstanding shares 6 years 1 month 24 days     6 years 8 months 5 days                                      
Weighted-average exercise price, outstanding shares $ 3.42   $ 1.34 $ 3.42                                      
Aggregate intrinsic value, outstanding shares       6,732,813                                      
Options exercisable       2,036,427                                      
Weighted-average remaining contractual term, exercisable shares 6 years 8 months 5 days     4 years 10 months 28 days                                      
Weighted-average exercise price, exercisable shares       $ 1.36                                      
Aggregate intrinsic value, exercisable shares       5,560,133                                      
Shares available for grant under the Director Plan                 700,000   700,000                        
Recognized stock-based compensation expense related to the outstanding restricted stock units                 $ 168,838 $ 76,861 $ 383,553 $ 102,482                      
Warrants issued                               288,582              
Number of shares cancelled in consideration of the issuance                               32,846