CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Total
Balance at Feb. 28, 2019 $ 2,418,400 $ 8,975,100 $ 25,754,900 $ (11,217,900) $ 25,930,500
Balance (in Shares) at Feb. 28, 2019 12,092,080     3,896,998  
Purchases of treasury stock       $ (302,500) (302,500)
Purchases of treasury stock (in Shares)       36,959  
Sales of treasury stock   68,100   $ 54,300 122,400
Sales of treasury stock (in Shares)       (19,171)  
Dividends declared     (408,900)   (408,900)
Share-based compensation expense   166,300     166,300
Net earnings     1,363,600   1,363,600
Balance at May. 31, 2019 $ 2,418,400 9,209,500 26,709,600 $ (11,466,100) 26,871,400
Balance (in Shares) at May. 31, 2019 12,092,080     3,914,786  
Balance at Feb. 29, 2020 $ 2,482,000 9,843,900 29,732,200 $ (12,665,300) 29,392,800
Balance (in Shares) at Feb. 29, 2020 12,410,080     4,061,429  
Purchases of treasury stock       $ (75,500) (75,500)
Purchases of treasury stock (in Shares)       17,565  
Sales of treasury stock   5,000   $ 66,000 71,000
Sales of treasury stock (in Shares)       (21,167)  
Dividends declared     (502,200)   (502,200)
Share-based compensation expense   169,000     169,000
Net earnings     1,931,100   1,931,100
Balance at May. 31, 2020 $ 2,482,000 $ 10,017,900 $ 31,161,100 $ (12,674,800) $ 30,986,200
Balance (in Shares) at May. 31, 2020 12,410,080     4,057,827