Marketable Securities (Tables)

9 Months Ended

Apr. 30, 2019

Investments, Debt and Equity Securities [Abstract]

Schedule of financial assets measured at fair value on recurring basis

In accordance with the provisions of Fair Value Measurements, the following are the Company's financial assets measured on a recurring basis presented at fair value.

Fair value measurements at reporting date

	Total								Total
	April 30,								July 31,
Description	2019		Level 1		Level 2		Level 3		2018		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	3,427,716	$	3,427,716	$	–	$	–	$	3,141,828	$	3,141,828	$	–	$	–

Schedule of classified marketable securities

As of April 30, 2019 and July 31, 2018, the Company's marketable securities were classified as follows:

	April 30, 2019								July 31, 2018
			Gross		Gross						Gross		Gross
			Unrealized		Unrealized		Fair				Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value		Cost		Gains		Losses		Value
Noncurrent:
Mutual funds	$	844,106	$	233,546	$	–	$	1,077,652	$	774,602	$	237,149	$	–	$	1,011,751
Equity securities		1,640,264		709,800		–		2,350,064		1,567,089		562,988		–		2,130,077
	$	2,484,370	$	943,346	$	–	$	3,427,716	$	2,341,691	$	800,137	$	–	$	3,141,828

Schedule of investment income

Investment income consists of the following:

	Three Months Ended				Nine Months Ended
	April 30				April 30
	2019		2018		2019		2018
Gain (loss) on sale of marketable securities	$	–	$	912	$	46,415	$	(805	)
Interest income		15,025		5,737		42,466		12,488
Dividend income		12,352		9,260		95,607		78,448
Total	$	27,377	$	15,909	$	184,488	$	90,131