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)			71,263		71,263
Balance at Jan. 31, 2020	2,178,297	3,346,245	50,442,586	(1,287,852)	54,679,276
Balance at Oct. 31, 2019	2,178,297	3,346,245	50,499,867	(1,287,852)	54,736,557
Net income (loss)			(57,281)		(57,281)
Balance at Jan. 31, 2020	2,178,297	3,346,245	50,442,586	(1,287,852)	54,679,276
Balance at Jul. 31, 2020	2,178,297	3,346,245	49,465,318	(1,287,852)	53,702,008
Net income (loss)			(469,531)		(469,531)
Balance at Jan. 31, 2021	2,178,297	3,346,245	48,995,787	(1,287,852)	53,232,477
Balance at Oct. 31, 2020	2,178,297	3,346,245	49,049,894	(1,287,852)	53,286,584
Net income (loss)			(54,107)		(54,107)
Balance at Jan. 31, 2021	$ 2,178,297	$ 3,346,245	$ 48,995,787	$ (1,287,852)	$ 53,232,477