Quarterly report pursuant to Section 13 or 15(d)

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

v3.3.1.900
Stockholder's Equity - Significant Option Groups Exercisable Option and its Price and Contractual Life (Detail)
3 Months Ended
Feb. 29, 2016
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Outstanding | shares 968,930
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 9 months 4 days
Outstanding, Weighted Average Exercise Price $ 2.17
Exercisable, Outstanding | shares 959,552
Exercisable, Weighted Average Exercise Price $ 2.16
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) 5 years 2 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 480,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 2 months 23 days
Outstanding, Weighted Average Exercise Price $ 2.56
Exercisable, Outstanding | shares 480,500
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 22,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 6 years 4 months 10 days
Outstanding, Weighted Average Exercise Price $ 3.08
Exercisable, Outstanding | shares 13,122
Exercisable, Weighted Average Exercise Price $ 3.08