Marketable Securities (Schedule of classified marketable securities) (Details) (USD $)	3 Months Ended	12 Months Ended
	Oct. 31, 2014	Jul. 31, 2014
Available-for-sale - Fair Value	$ 1,432,094	$ 1,354,213
Noncurrent [Member]
Available-for-sale - Cost	1,120,520	1,117,801
Available-for-sale - Gross Unrealized Gains	311,574	236,412
Available-for-sale - Gross Unrealized Losses
Available-for-sale - Fair Value	1,432,094	1,354,213
Noncurrent [Member] | Mutual Funds [Member]
Available-for-sale - Cost	689,014	691,047
Available-for-sale - Gross Unrealized Gains	142,077	129,173
Available-for-sale - Gross Unrealized Losses
Available-for-sale - Fair Value	831,091	820,220
Noncurrent [Member] | Equity Securities [Member]
Available-for-sale - Cost	431,506	426,754
Available-for-sale - Gross Unrealized Gains	169,497	107,239
Available-for-sale - Gross Unrealized Losses
Available-for-sale - Fair Value	$ 601,003	$ 533,993