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Stockholders' Equity - Additional Information (Detail) (USD $)
 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2009
May 31, 2005
Jun. 30, 2013
William Blair & Company, L.L.C [Member]
Sep. 30, 2013
William Blair & Company, L.L.C [Member]
Sep. 30, 2013
Warrants [Member]
Dec. 31, 2009
Warrants [Member]
May 31, 2005
Warrants [Member]
May 31, 2011
Common Stock [Member]
Dec. 31, 2010
Common Stock [Member]
May 31, 2011
Common Stock [Member]
Private Placement [Member]
Oct. 31, 2010
Common Stock [Member]
Private Placement [Member]
Sep. 30, 2013
Convertible debentures [Member]
Warrants [Member]
Sep. 30, 2013
2012 Plan [Member]
Jan. 31, 2012
Minimum [Member]
May 31, 2003
Minimum [Member]
Sep. 30, 2013
Minimum [Member]
John H. Harland Company [Member]
Warrants [Member]
Sep. 30, 2013
Maximum [Member]
John H. Harland Company [Member]
Warrants [Member]
Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]
Sep. 30, 2012
Restricted Stock Units (RSUs) [Member]
Sep. 30, 2011
Restricted Stock Units (RSUs) [Member]
Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]
2012 Plan [Member]
Sep. 30, 2013
Restricted stock units [Member]
Sep. 30, 2012
Restricted stock units [Member]
Sep. 30, 2011
Restricted stock units [Member]
Sep. 30, 2013
Outstanding Restricted Stock [Member]
Sep. 30, 2013
Stock options [Member]
Sep. 30, 2012
Stock options [Member]
Sep. 30, 2011
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                                
Common stock, shares sold 30,361,442 25,995,216         2,857,142     337,501 321,428 2,857,143     500,000                                  
Common stock, price per share             $ 5.25         $ 5.25     $ 1.50                                  
Net proceeds from issuance of common stock $ 16,004,797   $ 14,595,366       $ 13,877,447         $ 15,000,000     $ 750,000                                  
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                                        
Legal fees in connection with private placement                           80,000                                    
Underwriting discounts and commissions and other offering expenses             1,122,549                                                  
Additional shares of common stock to cover over allotments             428,571                                                  
Underwriter option exercised               2,127,350                                                
Common stock outstanding 30,361,442 25,995,216             6,667                                              
Common stock issued exercise price 0.91       0.91 0.70     0.91                                              
Warrants expire date                 2014-12             2014-12       2012-02 2012-05                      
Warrants issued                 288,582                                              
Number of shares canceled in consideration of the issuance                 32,846                                              
Common stock exercised                               330,834                                
Estimated average forfeiture rate 15.30%                                                              
Recognized compensation expense 2,791,862 2,599,858 1,271,238                                                     2,023,023 2,070,786 1,091,894
Unrecognized compensation expense 5,350,198                                                 2,274,490            
Weighted average period for unrecognized compensation expense expected to be recognized 2 years 8 months 23 days                                                       3 years 1 month 6 days      
Total intrinsic value of options exercised 3,832,374 14,215,750 4,731,689                                                          
Weighted-average exercise price, outstanding shares $ 4.09 $ 3.39 $ 1.34 $ 0.66                                   $ 4.85 $ 6.30 $ 5.12                
Common stock reserved for issuance under stock holders incentive plan                                   2,000,000                            
Purchase of common stock                                 1,214,397   400,000                          
Options outstanding 2,824,964 3,512,286 4,553,904 4,534,328                                   692,504 515,834 300,000 217,504              
Number of common stock reserved for future grants                                 776,308                              
Common stock reserved for issuance of restricted stock units                                                   1,000,000            
Restricted stock units vesting period                                                   4 years            
Recognized stock-based compensation expense related to the outstanding RSUs                                                   $ 768,839 $ 529,072 $ 179,343