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Long-term debt (Details) - USD ($)
Feb. 29, 2020
Feb. 28, 2019
Long-term debt $ 707,716 $ 870,531
Due within one year 169,716 162,816
Due after one year 538,000 707,715
Note payable, bank, collateralized by land and buildings, payable in monthly installments of principal and interest of $16,358 through January 2024. Interest rate 4.15%. 10 year term.    
Long-term debt $ 707,716 $ 870,531