Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Significant Option Groups Outstanding and Exercisable Option and its Price and Contractual Life (Detail)

v2.4.0.8
Stockholders' Equity - Significant Option Groups Outstanding and Exercisable Option and its Price and Contractual Life (Detail) (USD $)
12 Months Ended
Nov. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Outstanding 1,112,260
Outstanding, Weighted Average Remaining Contractual Life (Years) 6 years 4 months 24 days
Outstanding, Weighted Average Exercise Price $ 2.11
Exercisable, Outstanding 1,003,108
Exercisable, Weighted Average Exercise Price $ 2.09
Range 1 [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices Minimum $ 0.42
Range of Exercise Prices Maximum $ 1.00
Outstanding, Outstanding 7,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 1 year 4 months 24 days
Outstanding, Weighted Average Exercise Price $ 0.78
Exercisable, Outstanding 7,500
Exercisable, Weighted Average Exercise Price $ 0.78
Range 2 [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices Minimum $ 1.01
Range of Exercise Prices Maximum $ 2.00
Outstanding, Outstanding 531,759
Outstanding, Weighted Average Remaining Contractual Life (Years) 6 years 11 months 9 days
Outstanding, Weighted Average Exercise Price $ 1.70
Exercisable, Outstanding 513,424
Exercisable, Weighted Average Exercise Price $ 1.70
Range 3 [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices Minimum $ 2.01
Range of Exercise Prices Maximum $ 3.00
Outstanding, Outstanding 573,001
Outstanding, Weighted Average Remaining Contractual Life (Years) 5 years 11 months 19 days
Outstanding, Weighted Average Exercise Price $ 2.50
Exercisable, Outstanding 482,184
Exercisable, Weighted Average Exercise Price $ 2.54