Annual report pursuant to Section 13 and 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)
12 Months Ended
Nov. 30, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Outstanding | shares 1,026,979
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 5 months 23 days
Outstanding, Weighted Average Exercise Price $ 2.50
Exercisable, Outstanding | shares 987,811
Exercisable, Weighted Average Exercise Price $ 2.41
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 423,750
Outstanding, Weighted Average Remaining Contractual Life (Years) 3 years 11 months 4 days
Outstanding, Weighted Average Exercise Price $ 1.73
Exercisable, Outstanding | shares 423,750
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 351,000
Outstanding, Weighted Average Remaining Contractual Life (Years) 2 years 9 months 22 days
Outstanding, Weighted Average Exercise Price $ 2.68
Exercisable, Outstanding | shares 351,000
Exercisable, Weighted Average Exercise Price $ 2.68
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 6 months 25 days
Outstanding, Weighted Average Exercise Price $ 3.18
Exercisable, Outstanding | shares 205,564
Exercisable, Weighted Average Exercise Price $ 3.18
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 25,000
Outstanding, Weighted Average Remaining Contractual Life (Years) 9 years 4 months 2 days
Outstanding, Weighted Average Exercise Price $ 6.95
Exercisable, Outstanding | shares 7,497
Exercisable, Weighted Average Exercise Price $ 7.00