Quarterly report pursuant to Section 13 or 15(d)

Income per Common Share - Calculation of Basic and Diluted Net Income per Common Share (Detail)

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Income per Common Share - Calculation of Basic and Diluted Net Income per Common Share (Detail) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Aug. 31, 2021
Aug. 31, 2020
Aug. 31, 2021
Aug. 31, 2020
Numerator:            
Net Income $ 856,494 $ 784,467 $ 2,720,713 $ 2,424,771 $ 2,720,713 $ 2,424,771
Denominator:            
Weighted-average shares outstanding-basic 8,452,374 7,545,613 7,996,278 7,544,124 7,996,278 7,544,124
Dilutive common shares issuable upon exercise of stock options 239,957 633,852 221,176 593,339    
Weighted-average shares-diluted 8,692,331 8,179,465 8,217,454 8,137,463 8,217,454 8,137,463
Net income per common share:            
Basic $ 0.10 $ 0.10 $ 0.34 $ 0.32 $ 0.34 $ 0.32
Diluted $ 0.10 $ 0.10 $ 0.33 $ 0.30 $ 0.33 $ 0.30