Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
Stockholders' Equity - Significant Option Groups Exercisable Option and its Price and Contractual Life (Detail)
9 Months Ended
Aug. 31, 2016
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Outstanding | shares 1,142,010
Outstanding, Weighted Average Remaining Contractual Life (Years) 5 years 2 months 27 days
Outstanding, Weighted Average Exercise Price $ 2.36
Exercisable, Outstanding | shares 995,740
Exercisable, Weighted Average Exercise Price $ 2.24
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
Outstanding, Outstanding | shares 441,781
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 11 months 27 days
Outstanding, Weighted Average Exercise Price $ 1.72
Exercisable, Outstanding | shares 441,781
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
Outstanding, Outstanding | shares 473,000
Outstanding, Weighted Average Remaining Contractual Life (Years) 3 years 9 months 4 days
Outstanding, Weighted Average Exercise Price $ 2.57
Exercisable, Outstanding | shares 473,000
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
Range of Exercise Prices Maximum $ 4
Outstanding, Outstanding | shares 227,229
Outstanding, Weighted Average Remaining Contractual Life (Years) 8 years 9 months 26 days
Outstanding, Weighted Average Exercise Price $ 3.18
Exercisable, Outstanding | shares 80,959
Exercisable, Weighted Average Exercise Price $ 3.14