CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($)	Common Stock	Additional Paid In Capital	Retained Earnings	Common Stock Held in Treasury	Total
Balance at Jul. 31, 2019	$ 2,178,297	$ 3,346,245	$ 50,371,323	$ (1,287,852)	$ 54,608,013
Net income (loss)			128,544		128,544
Balance at Oct. 31, 2019	2,178,297	3,346,245	50,499,867	(1,287,852)	54,736,557
Balance at Jul. 31, 2020	2,178,297	3,346,245	49,465,318	(1,287,852)	53,702,008
Net income (loss)			(415,424)		(415,424)
Balance at Oct. 31, 2020	$ 2,178,297	$ 3,346,245	$ 49,049,894	$ (1,287,852)	$ 53,286,584