Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Stockholders' Equity - Significant Option Groups Exercisable Option and its Price and Contractual Life (Detail)
6 Months Ended
May 31, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Outstanding | shares 1,110,229
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 7 months 6 days
Outstanding, Weighted Average Exercise Price $ 2.38
Exercisable, Outstanding | shares 1,037,405
Exercisable, Weighted Average Exercise Price $ 2.32
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 425,000
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 5 months 1 day
Outstanding, Weighted Average Exercise Price $ 1.73
Exercisable, Outstanding | shares 425,000
Exercisable, Weighted Average Exercise Price $ 1.73
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 458,000
Outstanding, Weighted Average Remaining Contractual Life (Years) 3 years 18 days
Outstanding, Weighted Average Exercise Price $ 2.58
Exercisable, Outstanding | shares 458,000
Exercisable, Weighted Average Exercise Price $ 2.58
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 227,229
Outstanding, Weighted Average Remaining Contractual Life (Years) 8 years 26 days
Outstanding, Weighted Average Exercise Price $ 3.18
Exercisable, Outstanding | shares 154,405
Exercisable, Weighted Average Exercise Price $ 3.19