Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Stockholders' Equity - Significant Option Groups Outstanding and Exercisable Option and its Price and Contractual Life (Detail)
6 Months Ended
May 31, 2021
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Outstanding, Outstanding | shares 705,275
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 5 months 26 days
Outstanding, Weighted Average Exercise Price $ 4.96
Exercisable, Outstanding | shares 622,865
Exercisable, Weighted Average Exercise Price $ 4.52
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 22,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 2 years 1 month 20 days
Outstanding, Weighted Average Exercise Price $ 1.95
Exercisable, Outstanding | shares 22,500
Exercisable, Weighted Average Exercise Price $ 1.95
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 180,632
Outstanding, Weighted Average Remaining Contractual Life (Years) 8 months 23 days
Outstanding, Weighted Average Exercise Price $ 2.73
Exercisable, Outstanding | shares 180,632
Exercisable, Weighted Average Exercise Price $ 2.73
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) 4 years 8 months 26 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 3,833
Outstanding, Weighted Average Remaining Contractual Life (Years) 5 years 1 month 6 days
Outstanding, Weighted Average Exercise Price $ 6.52
Exercisable, Outstanding | shares 3,388
Exercisable, Weighted Average Exercise Price $ 6.51
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 266,581
Outstanding, Weighted Average Remaining Contractual Life (Years) 6 years 9 months 21 days
Outstanding, Weighted Average Exercise Price $ 7.64
Exercisable, Outstanding | shares 210,566
Exercisable, Weighted Average Exercise Price $ 7.62
Range 6 [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Range of Exercise Prices Minimum 9.01
Range of Exercise Prices Maximum $ 10.00
Outstanding, Outstanding | shares 27,000
Outstanding, Weighted Average Remaining Contractual Life (Years) 6 years 8 months 12 days
Outstanding, Weighted Average Exercise Price $ 9.40
Exercisable, Outstanding | shares 1,050
Exercisable, Weighted Average Exercise Price $ 9.10