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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Earnings
Total
Beginning balance, value at Feb. 29, 2020 $ 153,482 $ 9,018,406 $ 610,519 $ 9,782,407
Shares, Outstanding at Feb. 29, 2020 15,348,180      
Cashless exercise of stock options $ 748 (748)  
Cashless exercise of stock options (shares) 74,805      
Stock based compensation expense   8,097   8,097
Net income     167,928 167,928
Ending balance, value at May. 31, 2020 $ 154,230 9,025,755 778,447 9,958,432
Shares, Outstanding at May. 31, 2020 15,422,985      
Beginning balance, value at Feb. 29, 2020 $ 153,482 9,018,406 610,519 9,782,407
Shares, Outstanding at Feb. 29, 2020 15,348,180      
Net income       666,169
Proceeds from exercise of stock options      
Ending balance, value at Nov. 30, 2020 $ 154,456 9,044,405 1,276,688 10,475,549
Shares, Outstanding at Nov. 30, 2020 15,445,594      
Beginning balance, value at May. 31, 2020 $ 154,230 9,025,755 778,447 9,958,432
Shares, Outstanding at May. 31, 2020 15,422,985      
Cashless exercise of stock options $ 130 (130)  
Cashless exercise of stock options (shares) 12,950      
Stock based compensation expense   7,906   7,906
Net income     177,763 177,763
Ending balance, value at Aug. 31, 2020 $ 154,360 9,033,531 956,210 10,144,101
Shares, Outstanding at Aug. 31, 2020 15,435,935      
Cashless exercise of stock options $ 96 (96)  
Cashless exercise of stock options (shares) 9,659      
Stock based compensation expense   10,970   10,970
Net income     320,478 320,478
Ending balance, value at Nov. 30, 2020 $ 154,456 9,044,405 1,276,688 10,475,549
Shares, Outstanding at Nov. 30, 2020 15,445,594      
Beginning balance, value at Feb. 28, 2021 $ 154,527 9,064,994 1,731,161 10,950,682
Shares, Outstanding at Feb. 28, 2021 15,452,656      
Cashless exercise of stock options $ 499 (499)  
Cashless exercise of stock options (shares) 49,901      
Stock based compensation expense   21,637   21,637
Net income     1,266,752 1,266,752
Ending balance, value at May. 31, 2021 $ 155,026 9,086,132 2,997,913 12,239,071
Shares, Outstanding at May. 31, 2021 15,502,557      
Beginning balance, value at Feb. 28, 2021 $ 154,527 9,064,994 1,731,161 10,950,682
Shares, Outstanding at Feb. 28, 2021 15,452,656      
Net income       1,986,745
Proceeds from exercise of stock options       8,775
Proceeds from exercise of stock options (shares) 239,563      
Ending balance, value at Nov. 30, 2021 $ 156,997 9,163,979 3,717,906 13,038,882
Shares, Outstanding at Nov. 30, 2021 15,699,719      
Beginning balance, value at May. 31, 2021 $ 155,026 9,086,132 2,997,913 12,239,071
Shares, Outstanding at May. 31, 2021 15,502,557      
Cashless exercise of stock options $ 287 (287)  
Cashless exercise of stock options (shares) 28,728      
Stock based compensation expense   19,080   19,080
Net income     343,824 343,824
Ending balance, value at Aug. 31, 2021 $ 155,313 9,104,925 3,341,737 12,601,975
Shares, Outstanding at Aug. 31, 2021 15,531,285      
Cashless exercise of stock options $ 1,609 (1,609)  
Cashless exercise of stock options (shares) 160,934      
Stock based compensation expense   51,963   51,963
Net income     376,169 376,169
Proceeds from exercise of stock options $ 75 8,700   $ 8,775
Proceeds from exercise of stock options (shares) 160,934     7,500
Ending balance, value at Nov. 30, 2021 $ 156,997 $ 9,163,979 $ 3,717,906 $ 13,038,882
Shares, Outstanding at Nov. 30, 2021 15,699,719