Quarterly report pursuant to Section 13 or 15(d)

Stock Options - Stock Option Activity for Options (Detail)

v2.4.0.8
Stock Options - Stock Option Activity for Options (Detail) (USD $)
 6 Months Ended 12 Months Ended
May 31, 2013
Nov. 30, 2012
Service-Based Vesting Condition Options [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding at November 30, 2012, Shares 1,183,098  
Granted, Shares 13,500  
Exercised, Shares (7,500)  
Expired/forfeited, Shares (70,172)  
Outstanding at May 31, 2013, Shares 1,118,926 1,183,098
Exercisable at May 31, 2013, Shares 958,111  
Outstanding at November 30, 2012, Weighted Average Exercise Price $ 2.15  
Granted, Weighted Average Exercise Price $ 2.09  
Exercised, Weighted Average Exercise Price $ 1.58  
Expired/forfeited, Weighted Average Exercise Price $ 2.82  
Outstanding at May 31, 2013, Weighted Average Exercise Price $ 2.11 $ 2.15
Exercisable at May 31, 2013, Weighted Average Exercise Price $ 2.07  
Outstanding, Weighted Average Remaining Contractual Term (Years) 6 years 10 months 28 days 7 years 1 month 13 days
Exercisable at May 31, 2013, Weighted Average Remaining Contractual Term (Years) 7 years 1 month 17 days  
Outstanding at November 30, 2012, Aggregate Intrinsic Value $ 580,730  
Granted, Aggregate Intrinsic Value 880  
Exercised, Aggregate Intrinsic Value 3,925  
Expired/forfeited, Aggregate Intrinsic Value 6,458  
Outstanding at May 31, 2013, Aggregate Intrinsic Value 261,694 580,730
Exercisable at May 31, 2013, Aggregate Intrinsic Value 253,928  
Performance and Market-Based Vesting Condition Options [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding at November 30, 2012, Shares 640,000  
Expired/forfeited, Shares     
Outstanding at May 31, 2013, Shares 640,000 640,000
Outstanding at November 30, 2012, Weighted Average Exercise Price $ 1.74  
Expired/forfeited, Weighted Average Exercise Price     
Outstanding at May 31, 2013, Weighted Average Exercise Price $ 1.74 $ 1.74
Exercisable at May 31, 2013, Weighted Average Exercise Price     
Outstanding, Weighted Average Remaining Contractual Term (Years) 8 years 3 months 29 days 8 years 9 months 29 days
Outstanding at November 30, 2012, Aggregate Intrinsic Value 511,600  
Outstanding at May 31, 2013, Aggregate Intrinsic Value $ 262,000 $ 511,600