Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
Stockholder's Equity - Significant Option Groups Exercisable Option and its Price and Contractual Life (Detail)
6 Months Ended
May 31, 2016
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Outstanding | shares 1,136,159
Outstanding, Weighted Average Remaining Contractual Life (Years) 5 years 3 months 26 days
Outstanding, Weighted Average Exercise Price $ 2.32
Exercisable, Outstanding | shares 1,019,264
Exercisable, Weighted Average Exercise Price $ 2.22
Range 1 [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 | shares 465,930
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 11 months 23 days
Outstanding, Weighted Average Exercise Price $ 1.72
Exercisable, Outstanding | shares 465,930
Exercisable, Weighted Average Exercise Price $ 1.72
Range 2 [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 | shares 478,000
Outstanding, Weighted Average Remaining Contractual Life (Years) 3 years 11 months 27 days
Outstanding, Weighted Average Exercise Price $ 2.56
Exercisable, Outstanding | shares 478,000
Exercisable, Weighted Average Exercise Price $ 2.56
Range 3 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices Minimum 3.01
Range of Exercise Prices Maximum $ 4.00
Outstanding, Outstanding | shares 192,229
Outstanding, Weighted Average Remaining Contractual Life (Years) 9 years 5 months 9 days
Outstanding, Weighted Average Exercise Price $ 3.15
Exercisable, Outstanding | shares 75,334
Exercisable, Weighted Average Exercise Price $ 3.14