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Income Taxes (Deferred Tax Assets And Liabilities) (Details) (USD $)	Jul. 31, 2012	Jul. 31, 2011
Income Tax Disclosure [Abstract]
Net operating loss carry-forward	$ 20,677,000	$ 18,327,000
Stock options and warrants	1,765,000	1,558,000
Other temporary differences	118,000	18,000
Total deferred tax assets	22,560,000	19,903,000
Valuation allowance for deferred tax assets	(22,560,000)	(19,903,000)
Net deferred tax assets	$ 0	$ 0

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.