Quarterly report pursuant to Section 13 or 15(d)

Stock Options - Significant Option Groups Outstanding and Exercisable Option and its Price and Contractual Life (Detail)

v2.4.0.8
Stock Options - Significant Option Groups Outstanding and Exercisable Option and its Price and Contractual Life (Detail) (USD $)
 3 Months Ended
Feb. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Weighted Average Remaining Contractual Life (Years) 6 years 3 months 26 days
Outstanding, Outstanding 1,075,593
Outstanding, Weighted Average Exercise Price $ 2.11
Exercisable, Outstanding 987,061
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 $ 2.00
Outstanding, Weighted Average Remaining Contractual Life (Years) 11 months 9 days
Outstanding, Outstanding 7,500
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 $ 1.00
Range of Exercise Prices Maximum $ 2.01
Outstanding, Weighted Average Remaining Contractual Life (Years) 6 years 9 months 4 days
Outstanding, Outstanding 521,759
Outstanding, Weighted Average Exercise Price $ 1.71
Exercisable, Outstanding 509,049
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 $ 1.01
Range of Exercise Prices Maximum $ 3.00
Outstanding, Weighted Average Remaining Contractual Life (Years) 5 years 11 months 23 days
Outstanding, Outstanding 546,334
Outstanding, Weighted Average Exercise Price $ 2.51
Exercisable, Outstanding 470,512
Exercisable, Weighted Average Exercise Price $ 2.53