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)
3 Months Ended
Feb. 28, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Outstanding | shares 1,120,229
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 9 months 26 days
Outstanding, Weighted Average Exercise Price $ 2.37
Exercisable, Outstanding | shares 1,041,780
Exercisable, Weighted Average Exercise Price $ 2.31
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 427,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 7 months 24 days
Outstanding, Weighted Average Exercise Price $ 1.73
Exercisable, Outstanding | shares 427,500
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 465,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 3 years 3 months 11 days
Outstanding, Weighted Average Exercise Price $ 2.57
Exercisable, Outstanding | shares 465,500
Exercisable, Weighted Average Exercise Price $ 2.57
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 3 months 26 days
Outstanding, Weighted Average Exercise Price $ 3.18
Exercisable, Outstanding | shares 148,780
Exercisable, Weighted Average Exercise Price $ 3.17