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 $)
 9 Months Ended 12 Months Ended
Aug. 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 36,000  
Exercised, Shares (10,000)  
Expired/forfeited, Shares (80,172)  
Outstanding at August 31, 2013, Shares 1,128,926 1,183,098
Exercisable at August 31, 2013, Shares 994,147  
Outstanding at November 30, 2012, Weighted Average Exercise Price $ 2.15  
Granted, Weighted Average Exercise Price $ 2.00  
Exercised, Weighted Average Exercise Price $ 1.50  
Expired/forfeited, Weighted Average Exercise Price $ 2.67  
Outstanding at August 31, 2013, Weighted Average Exercise Price $ 2.11 $ 2.15
Exercisable at August 31, 2013, Weighted Average Exercise Price $ 2.10  
Outstanding, Weighted Average Remaining Contractual Term (Years) 6 years 8 months 19 days 7 years 1 month 13 days
Exercisable at August 31, 2013, Weighted Average Remaining Contractual Term (Years) 6 years 10 months 13 days  
Outstanding at November 30, 2012, Aggregate Intrinsic Value $ 580,730  
Granted, Aggregate Intrinsic Value 7,490  
Exercised, Aggregate Intrinsic Value 5,575  
Expired/forfeited, Aggregate Intrinsic Value 12,925  
Outstanding at August 31, 2013, Aggregate Intrinsic Value 300,637 580,730
Exercisable at August 31, 2013, Aggregate Intrinsic Value 287,792  
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  
Granted, Shares     
Exercised, Shares     
Expired/forfeited, Shares     
Outstanding at August 31, 2013, Shares 640,000 640,000
Exercisable at August 31, 2013, Shares     
Outstanding at November 30, 2012, Weighted Average Exercise Price $ 1.74  
Granted, Weighted Average Exercise Price     
Exercised, Weighted Average Exercise Price     
Expired/forfeited, Weighted Average Exercise Price     
Outstanding at August 31, 2013, Weighted Average Exercise Price $ 1.74 $ 1.74
Exercisable at August 31, 2013, Weighted Average Exercise Price     
Outstanding, Weighted Average Remaining Contractual Term (Years) 8 years 29 days 8 years 9 months 29 days
Exercisable at August 31, 2013, Weighted Average Remaining Contractual Term (Years)     
Outstanding at November 30, 2012, Aggregate Intrinsic Value 511,600  
Outstanding at August 31, 2013, Aggregate Intrinsic Value 300,000 511,600
Exercisable at August 31, 2013, Aggregate Intrinsic Value