Marketable Securities (Tables)

9 Months Ended

Apr. 30, 2013

Investments, Debt and Equity Securities [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

In accordance with the provisions of Fair Value Measurements, the following are the Company's financial assets presented at fair value at April 30, 2013 and July 31, 2012.

Fair value measurements at reporting date using

Quoted prices

Quoted prices

in active

Significant

in active

Significant

markets for

other

Significant

markets for

other

Significant

identical

observable

unobservable

identical

observable

unobservable

assets/liabilities

inputs

inputs

assets/liabilities

inputs

inputs

April 30

July 31

Description

2013

(Level 1)

(Level 2)

(Level 3)

2012

(Level 1)

(Level 2)

(Level 3)

Assets:

Marketable securities -

available-for-sale

$

2,420,010

$

2,420,010

$

–

$

–

$

2,215,209

$

2,215,209

$

–

$

–

held-to-maturity

76,419

76,419

–

–

178,176

178,176

–

–

$

2,496,429

$

2,496,429

$

–

$

–

$

2,393,385

$

2,393,385

$

–

$

–

Marketable Securities [Table Text Block]

As of April 30, 2013 and July 31, 2012, the Company's marketable securities were classified as follows:

	April 30, 2013								July 31, 2012
			Gross		Gross						Gross		Gross
			Unrealized		Unrealized		Fair				Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value		Cost		Gains		Losses		Value
Current:
Held-to-maturity:
Certificate of deposit	$	50,307	$	–	$	–	$	50,307	$	50,246	$	–	$	–	$	50,246
Corporate debt
securities		75,205		1,214		–		76,419		176,151		2,025		–		178,176
	$	125,512	$	1,214	$	–	$	126,726	$	226,397	$	2,025	$	–	$	228,422
Noncurrent:
Available-for-sale:
Mutual funds	$	1,554,354	$	227,765	$	113	$	1,782,006	$	1,255,982	$	123,203	$	–	$	1,379,185
Equity securities		511,738		128,708		2,442		638,004		715,750		135,813		15,539		836,024
	$	2,066,092	$	356,473	$	2,555	$	2,420,010	$	1,971,732	$	259,016	$	15,539	$	2,215,209

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

The Company's debt and 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, at April 30, 2013, are as follows:

			Less Than		More Than
	Fair Value		12 Months		12 Months
Equity securities	$	59,757	$	2,442	$	–
Mutual funds		259,133		113		–
Total	$	318,890	$	2,555	$	–

Investment Income [Table Text Block]

Investment income consists of the following:

	Three Months Ended						Nine Months Ended
	April 30						April 30
	2013			2012			2013			2012
Loss on sale of marketable securities	$	(2,805	)	$	(2,500	)	$	(3,322	)	$	(16,732	)
Interest income		4,337			(1,031	)		9,229			7,321
Dividend income		10,562			8,490			63,384			32,587
Total	$	12,094		$	4,959		$	69,291		$	23,176