Marketable Securities (Tables)

9 Months Ended

Apr. 30, 2018

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	2018		Level 1		Level 2		Level 3	2017		Level 1		Level 2		Level 3
Assets:
Marketable securities - available-for-sale	$	2,722,917	$	2,722,917	$	–	–	$	2,815,727	$	2,815,727	$	–	$	–

Schedule of classified marketable securities

As of April 30, 2018 and July 31, 2017, the Company's marketable securities were classified as follows:

	April 30, 2018								July 31, 2017
			Gross		Gross						Gross		Gross
			Unrealized		Unrealized		Fair				Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value		Cost		Gains		Losses		Value
Noncurrent:
Available-for-sale:
Mutual funds	$	773,158	$	197,217	$	–	$	970,375	$	716,463	$	193,932	$	–	$	910,395
Equity securities		1,312,772		453,562		13,792		1,752,542		1,540,788		364,544		–		1,905,332
	$	2,085,930	$	650,779	$	13,792	$	2,722,917	$	2,257,251	$	558,476	$	–	$	2,815,727

Schedule of debt and equity securities in a continuous unrealized loss position

The Company's equity securities, gross unrealized losses and fair value, aggregated by investment category and length of time that the investment securities have been in a continuous unrealized loss position are as follows:

	April 30, 2018				July 31, 2017
			Less Than				Less Than
	Fair Value		12 Months		Fair Value		12 Months
Corporate equity securities	$	120,188	$	13,792	$	–	$	–

Schedule of investment income

Investment income consists of the following:
	Three Months Ended				Nine Months Ended
	April 30				April 30
		2018		2017		2018			2017
Gain (loss) on sale of marketable securities	$	912	$	31,155	$	(805	)	$	23,734
Interest income		5,737		2,941		12,488			9,287
Dividend income		9,260		7,810		78,448			47,449
Total	$	15,909	$	41,906	$	90,131		$	80,470