Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details Textual)

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Stockholders' Equity (Details Textual) (USD $)
 12 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Stockholders Equity (Textual) [Abstract]    
Stock option outstanding under 2000 stock incentive plan 1,823,098 608,419
Recognized compensation cost $ 1,325,000 $ 329,000
Service-based vesting condition options [Member]
    
Stockholders Equity (Textual) [Abstract]    
Share receive for option exercises 33,562  
Number of option surrendered 171,259  
Stock option outstanding under 2000 stock incentive plan 1,183,098 608,419
Granted, Options 779,500  
Performance and market-based vesting condition options [Member]
    
Stockholders Equity (Textual) [Abstract]    
Share receive for option exercises     
Stock option outstanding under 2000 stock incentive plan 640,000   
Granted, Options 1,170,000  
Performance based vesting condition options [Member]
    
Stockholders Equity (Textual) [Abstract]    
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted 616,000  
Market-based vesting condition options [Member]
    
Stockholders Equity (Textual) [Abstract]    
Granted, Options 213,334  
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted 121,500  
Stock Options [Member]
    
Stockholders Equity (Textual) [Abstract]    
Recognized compensation cost 171,000  
Stock Option [Member]
    
Stockholders Equity (Textual) [Abstract]    
Number of share issued to option holder   68,417
Option exercised   80,936
Share receive for option exercises 33,562 56,667
Number of option surrendered 26,749 24,431
Issuance of common stock to cover the total cost of exercising the stock option 6,813 32,236
Stock Option [Member] | Service-based vesting condition options [Member]
    
Stockholders Equity (Textual) [Abstract]    
Weighted average grant date fair value of options $ 1.57 $ 2.12
Weighted-average period 1 year 7 months 24 days  
Total fair value of shares vested 1,276,000  
Stock Option [Member] | Performance and market-based vesting condition options [Member]
    
Stockholders Equity (Textual) [Abstract]    
Weighted average grant date fair value of options $ 1.28  
Stock Option [Member] | Performance based vesting condition options [Member]
    
Stockholders Equity (Textual) [Abstract]    
Granted, Shares 956,666  
2000 Plan [Member] | Service-based vesting condition options [Member]
    
Stockholders Equity (Textual) [Abstract]    
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted 250,000  
2000 Plan [Member] | Employee stock incentive plan [Member]
    
Stockholders Equity (Textual) [Abstract]    
Common stock for issuance pursuant to stock options or restricted stock 2,250,000  
Vesting period ranging from, date of grant 3 years  
Options exercisable period after termination 90 days  
Stock option outstanding under 2000 stock incentive plan 60,589 99,292
Shares issued under 2000 stock incentive plan 0  
2006 Plan [Member] | Service-based vesting condition options [Member]
    
Stockholders Equity (Textual) [Abstract]    
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted 250,000  
2006 Plan [Member] | Employee stock incentive plan [Member]
    
Stockholders Equity (Textual) [Abstract]    
Common stock for issuance pursuant to stock options or restricted stock 1,000,000  
Shares issued under 2000 stock incentive plan 151,345  
Share issued 762,509 509,127
2012 plan [Member] | Service-based vesting condition options [Member]
    
Stockholders Equity (Textual) [Abstract]    
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted $ 250,000  
2012 plan [Member] | Employee stock incentive plan [Member]
    
Stockholders Equity (Textual) [Abstract]    
Common stock for issuance pursuant to stock options or restricted stock 1,500,000  
Shares issued under 2000 stock incentive plan 1,500,000  
Increase in common stock reserved for issuance 2,500,000  
Granted, Options 1,000,000  
Maximum [Member] | 2000 Plan [Member] | Employee stock incentive plan [Member]
    
Stockholders Equity (Textual) [Abstract]    
Term of options P7Y  
Minimum [Member] | 2000 Plan [Member] | Employee stock incentive plan [Member]
    
Stockholders Equity (Textual) [Abstract]    
Term of options P5Y