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
Feb. 28, 2021
Feb. 29, 2020
Numerator:    
Net Income $ 693,590 $ 686,966
Denominator:    
Weighted-average shares outstanding-basic 7,570,913 7,541,113
Dilutive common shares issuable upon exercise of stock options 627,678 587,144
Weighted-average shares-diluted 8,198,591 8,128,257
Earnings (Loss) per share:    
Basic $ 0.09 $ 0.09
Diluted $ 0.08 $ 0.08