Annual report pursuant to Section 13 and 15(d)

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

v3.19.3.a.u2
Stockholders' Equity - Significant Option Groups Outstanding and Exercisable Option and its Price and Contractual Life (Detail)
12 Months Ended
Nov. 30, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Outstanding | shares 1,089,774
Outstanding, Weighted Average Remaining Contractual Life (Years) 3 years 10 months 27 days
Outstanding, Weighted Average Exercise Price $ 3.30
Exercisable, Outstanding | shares 964,540
Exercisable, Weighted Average Exercise Price $ 2.75
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 422,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 2 years 1 month 6 days
Outstanding, Weighted Average Exercise Price $ 1.73
Exercisable, Outstanding | shares 422,500
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 265,000
Outstanding, Weighted Average Remaining Contractual Life (Years) 2 years 1 month 9 days
Outstanding, Weighted Average Exercise Price $ 2.72
Exercisable, Outstanding | shares 265,000
Exercisable, Weighted Average Exercise Price $ 2.72
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 204,729
Outstanding, Weighted Average Remaining Contractual Life (Years) 6 years 2 months 23 days
Outstanding, Weighted Average Exercise Price $ 3.14
Exercisable, Outstanding | shares 204,729
Exercisable, Weighted Average Exercise Price $ 3.14
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 2,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 7 months 24 days
Outstanding, Weighted Average Exercise Price $ 6.50
Exercisable, Outstanding | shares 1,667
Exercisable, Weighted Average Exercise Price $ 6.50
Range 5 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices Minimum 7.01
Range of Exercise Prices Maximum $ 8.00
Outstanding, Outstanding | shares 195,045
Outstanding, Weighted Average Remaining Contractual Life (Years) 7 years 10 months 2 days
Outstanding, Weighted Average Exercise Price $ 7.63
Exercisable, Outstanding | shares 70,644
Exercisable, Weighted Average Exercise Price $ 7.67