Income Taxes (Details 6) - USD ($)	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Deferred tax assets
Deferred tax assets related to foreign tax credits carryovers		$ 133,000
Deferred tax assets, valuation allowance
Decrease in overall valuation allowances	$ 1,501,000
Valuation allowances	$ 2,037,000	$ 3,538,000