Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Stockholders' Equity - Significant Option Groups Exercisable Option and its Price and Contractual Life (Detail)
9 Months Ended
Aug. 31, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Outstanding | shares 1,130,229
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 4 months 28 days
Outstanding, Weighted Average Exercise Price $ 2.47
Exercisable, Outstanding | shares 1,044,697
Exercisable, Weighted Average Exercise Price $ 2.34
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 2 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 455,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 2 years 9 months 22 days
Outstanding, Weighted Average Exercise Price $ 2.58
Exercisable, Outstanding | shares 455,500
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) 7 years 9 months 25 days
Outstanding, Weighted Average Exercise Price $ 3.18
Exercisable, Outstanding | shares 162,325
Exercisable, Weighted Average Exercise Price $ 3.19
Range 4 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices Minimum 6.01
Range of Exercise Prices Maximum $ 7.00
Outstanding, Outstanding | shares 22,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 6 years 10 months 21 days
Outstanding, Weighted Average Exercise Price $ 7.00
Exercisable, Outstanding | shares 1,872
Exercisable, Weighted Average Exercise Price $ 7.00