Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
Income Tax Disclosure [Line Items]
Current Income Tax Expense (Benefit)	$ 1,600	$ 5,000
Tax Credit Carryforward, Deferred Tax Asset	17,300,000
Valuation Allowance, Deferred Tax Asset, Change in Amount	2,089,000
Transaction period	3 years
Ownership Change Percent Points Of Outstanding Stock	50.00%
Internal Revenue Service (IRS) [Member]
Income Tax Disclosure [Line Items]
Operating Loss Carryforwards	75,200,000	70,700,000
Operating Loss Carryforwards, Expiration Dates	July 31, 2033
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Operating Loss Carryforwards	$ 64,900,000	$ 60,000,000
Maximum [Member] | State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Operating Loss Carryforwards, Expiration Dates	July 31, 2032
Minimum [Member] | State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Operating Loss Carryforwards, Expiration Dates	July 31, 2014