Quarterly report pursuant to Section 13 or 15(d)

Stockholder's Equity - Stock Option Activity for Options (Detail)

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Stockholder's Equity - Stock Option Activity for Options (Detail) (USD $)
 6 Months Ended 12 Months Ended
May 31, 2014
Nov. 30, 2013
Service-Based Vesting Condition Options [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding Shares, Beginning Balance 1,112,260  
Exercised, Shares 32,496  
Expired/forfeited, Shares (63,748)  
Outstanding Shares, Ending Balance 1,016,016 1,112,260
Exercisable, Shares, Ending Balance 972,270  
Outstanding, Weighted Average Exercise Price, Beginning Balance $ 2.11  
Exercised, Weighted Average Exercise Price $ 1.50  
Expired/forfeited, Weighted Average Exercise Price $ 2.13  
Outstanding, Weighted Average Exercise Price, Ending Balance $ 2.13 $ 2.11
Exercisable, Weighted Average Exercise Price, Ending Balance $ 2.12  
Outstanding, Weighted Average Remaining Contractual Term (Years), Beginning Balance 6 years 2 months 12 days 6 years 4 months 24 days
Exercisable, Weighted Average Remaining Contractual Term (Years), Ending Balance 6 years 3 months 7 days  
Outstanding, Aggregate Intrinsic Value, Beginning Balance $ 88,614  
Exercised, Aggregate Intrinsic Value 31,149  
Expired/forfeited, Aggregate Intrinsic Value 23,700  
Outstanding, Aggregate Intrinsic Value, Ending Balance 435,491 88,614
Exercisable, Aggregate Intrinsic Value, Ending Balance 427,684  
Performance and Market-Based Vesting Condition Options [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding Shares, Beginning Balance 640,000  
Expired/forfeited, Shares (600,000)  
Outstanding Shares, Ending Balance 40,000 640,000
Outstanding, Weighted Average Exercise Price, Beginning Balance $ 1.74  
Expired/forfeited, Weighted Average Exercise Price $ 1.72  
Outstanding, Weighted Average Exercise Price, Ending Balance $ 2.05 $ 1.74
Outstanding, Weighted Average Remaining Contractual Term (Years), Beginning Balance 4 years 9 months 4 days 7 years 9 months 29 days
Outstanding, Aggregate Intrinsic Value, Beginning Balance   70,000
Outstanding, Aggregate Intrinsic Value, Ending Balance $ 16,000