Marketable Securities (Tables)

3 Months Ended

Oct. 31, 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
	October 31,								July 31,
Description	2019		Level 1		Level 2		Level 3		2019		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	3,603,985	$	3,603,985	$	–	$	–	$	3,580,227	$	3,580,227	$	–	$	–

Schedule of classified marketable securities

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

	October 31, 2019								July 31, 2019
			Gross		Gross						Gross		Gross
			Unrealized		Unrealized		Fair				Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value		Cost		Gains		Losses		Value
Noncurrent:
Mutual funds	$	846,775	$	272,803	$	–	$	1,119,578	$	845,306	$	264,425	$	–	$	1,109,731
Equity securities		1,697,731		789,097		2,421		2,484,407		1,656,156		814,340		–		2,470,496
	$	2,544,506	$	1,061,900	$	2,421	$	3,603,985	$	2,501,462	$	1,078,765	$	–	$	3,580,227

Schedule of investment income

Investment income consists of the following:
	Three Months Ended
	October 31
	2019		2018
Gain on sale of marketable securities	$	46,981	$	–
Interest income		10,278		13,561
Dividend income		7,744		8,874
Total	$	65,003	$	22,435