Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.0.8
Stockholder's Equity - Significant Option Groups Outstanding and Exercisable Option and its Price and Contractual Life (Detail) (USD $)
 6 Months Ended
May 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Weighted Average Remaining Contractual Life (Years) 6 years 2 months 12 days
Outstanding, Outstanding 1,016,016
Outstanding, Weighted Average Exercise Price $ 2.13
Exercisable, Outstanding 972,270
Exercisable, Weighted Average Exercise Price $ 2.12
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, Weighted Average Remaining Contractual Life (Years) 1 year 2 months 12 days
Outstanding, Outstanding 2,500
Outstanding, Weighted Average Exercise Price $ 0.68
Exercisable, Outstanding 2,500
Exercisable, Weighted Average Exercise Price $ 0.68
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, Weighted Average Remaining Contractual Life (Years) 6 years 9 months 18 days
Outstanding, Outstanding 488,013
Outstanding, Weighted Average Exercise Price $ 1.72
Exercisable, Outstanding 480,928
Exercisable, Weighted Average Exercise Price $ 1.71
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, Weighted Average Remaining Contractual Life (Years) 5 years 7 months 28 days
Outstanding, Outstanding 525,503
Outstanding, Weighted Average Exercise Price $ 2.52
Exercisable, Outstanding 488,842
Exercisable, Weighted Average Exercise Price $ 2.52