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 9 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2020
Aug. 31, 2019
Numerator:        
Net Income $ 784,467 $ 1,116,259 $ 2,424,771 $ 1,445,809
Denominator:        
Weighted-average shares outstanding-basic 7,545,613 7,803,333 7,544,124 7,802,676
Dilutive common shares issuable upon exercise of stock options 633,852 641,904 593,339 627,575
Weighted-average shares-diluted 8,179,465 8,445,237 8,137,463 8,430,251
Net income per common share:        
Basic $ 0.10 $ 0.14 $ 0.32 $ 0.19
Diluted $ 0.10 $ 0.13 $ 0.30 $ 0.17