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)

v3.22.1
Stockholders' Equity - Significant Option Groups Outstanding and Exercisable Option and its Price and Contractual Life (Detail)
3 Months Ended
Feb. 28, 2022
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Outstanding | shares 474,927
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 6 months 29 days
Outstanding, Weighted Average Exercise Price $ 5.89
Exercisable, Outstanding | shares 420,911
Exercisable, Weighted Average Exercise Price $ 5.46
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 7,500
Outstanding, Weighted Average Remaining Contractual Life (Years) 1 year 4 months 20 days
Outstanding, Weighted Average Exercise Price $ 1.95
Exercisable, Outstanding | shares 7,500
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 15,000
Outstanding, Weighted Average Remaining Contractual Life (Years) 1 year 4 months 17 days
Outstanding, Weighted Average Exercise Price $ 2.22
Exercisable, Outstanding | shares 15,000
Exercisable, Weighted Average Exercise Price $ 2.22
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 179,729
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 7 days
Outstanding, Weighted Average Exercise Price $ 3.14
Exercisable, Outstanding | shares 179,729
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) 4 years 4 months 6 days
Outstanding, Weighted Average Exercise Price $ 6.52
Exercisable, Outstanding | shares 3,833
Exercisable, Weighted Average Exercise Price $ 6.52
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 230,381
Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 11 months 15 days
Outstanding, Weighted Average Exercise Price $ 7.63
Exercisable, Outstanding | shares 207,445
Exercisable, Weighted Average Exercise Price $ 7.59
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) 5 years 11 months 12 days
Outstanding, Weighted Average Exercise Price $ 9.40
Exercisable, Outstanding | shares 2,100
Exercisable, Weighted Average Exercise Price $ 9.10
Range 7 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices Minimum 12.01
Range of Exercise Prices Maximum $ 13.00
Outstanding, Outstanding | shares 11,484
Outstanding, Weighted Average Remaining Contractual Life (Years) 8 years 10 months 24 days
Outstanding, Weighted Average Exercise Price $ 12.63
Exercisable, Outstanding | shares 5,304
Exercisable, Weighted Average Exercise Price $ 12.63