Quarterly report pursuant to Section 13 or 15(d)

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

v3.3.0.814
Stockholder's Equity - Significant Option Groups Outstanding and Exercisable Option and its Price and Contractual Life (Detail)
 9 Months Ended
Aug. 31, 2015
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Outstanding | shares 976,430
Outstanding, Weighted Average Remaining Contractual Life (Years) 5 years 2 months 27 days
Outstanding, Weighted Average Exercise Price $ 2.17
Exercisable, Outstanding | shares 953,924
Exercisable, Weighted Average Exercise Price $ 2.15
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 8 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 488,000
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 8 months 12 days
Outstanding, Weighted Average Exercise Price $ 2.55
Exercisable, Outstanding | shares 486,122
Exercisable, Weighted Average Exercise Price $ 2.55
Range 3 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices Minimum 3.00
Range of Exercise Prices Maximum $ 4.00
Outstanding, Outstanding | shares 22,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 6 years 10 months 10 days
Outstanding, Weighted Average Exercise Price $ 3.08
Exercisable, Outstanding | shares 1,872
Exercisable, Weighted Average Exercise Price $ 3.08