Quarterly report pursuant to Section 13 or 15(d)

Stock Options (Details Textual)

v2.4.0.6
Stock Options (Details Textual) (USD $)
 9 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended
Aug. 31, 2012
Aug. 31, 2012
Service-based vesting condition options [Member]
Aug. 31, 2011
Service-based vesting condition options [Member]
Aug. 31, 2012
Performance and market-based vesting condition options [Member]
Aug. 31, 2012
Performance and market-based vesting condition options [Member]
Aug. 31, 2012
Market Based Vesting Condition Options [Member]
Aug. 31, 2012
Performance Based Vesting Condition Options [Member]
Aug. 31, 2012
2000 Plan [Member]
Nov. 30, 2011
2000 Plan [Member]
Aug. 31, 2012
2006 Plan [Member]
Nov. 30, 2011
2006 Plan [Member]
Aug. 31, 2012
2012 Plan [Member]
May 31, 2012
2012 Plan [Member]
Nov. 30, 2011
2012 Plan [Member]
Aug. 31, 2012
Maximum [Member]
2000 Plan [Member]
Aug. 31, 2012
Minimum [Member]
2000 Plan [Member]
Stock options (Textual) [Abstract]                                
Common stock for issuance pursuant to stock options or restricted stock               2,250,000   1,000,000     2,500,000 1,500,000    
Term of options                             P7Y P5Y
Vesting period ranging from, date of grant               3 years                
Options exercisable period after termination               90 days                
Shares outstanding under the plan               63,089 99,292 157,685   1,000,000        
Share issued                   727,988 509,127          
Shares granted                       1,500,000        
Weighted average grant date fair value of options   $ 1.55 $ 2.14 $ 0.00 $ 1.28                      
Options exercised   33,562 11,751                           
Stock options surrendered   26,749                            
Net common shares issued   6,813                            
Common stock options granted on vest based         213,334                      
Options granted remaining         956,666                      
Unrecognized compensation cost related to the non-vested market-based vesting condition options.           $ 131,400 $ 1,512,000                  
Stock Options (Additional Textual) [Abstract]                                
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted 401,000                              
Weighted-average period 2 years 4 months 24 days                              
Total fair value of shares vested $ 1,052,000