Accounting Records and Use of Estimates (Details) - USD ($)	9 Months Ended	12 Months Ended
	Apr. 30, 2016	Jul. 31, 2015
Operating Loss Carryforwards [Line Items]
Reduction in deferred tax asset on revision of tax code	$ 380,000
Reduction in deferred tax liability on revision of tax code	771,000
Reduction in deferred taxes on securities, revision of tax code	26,000
State and City deferred tax benefit	365,000
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 6,633,000	$ 8,244,000
Net operating loss utilized		1,611,000
Tax refund		537,881
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		$ 9,000,000