Condensed Consolidated Statements of Shareholders Equity - 3 months ended Aug. 31, 2020 - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 9	$ 3,729
Stock Issued During Period, Value, Employee Benefit Plan	75	25,470		$ (25,545)
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition		49,717
Net Income (Loss) Attributable to Parent			$ 176,011
Stockholders' Equity Attributable to Parent	$ 101,027	$ 9,837,979	$ 32,714,591	$ (2,886,577)