Exit Costs (Details) (USD $)	3 Months Ended		6 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Exit Costs [Abstract]
Current liability related to employee termination benefits	$ 126,000		$ 126,000
Exit Costs [Line Items]
Exit costs, incurred	657,000	514,000	719,000	514,000
Exit costs, cumulative	1,401,000		1,401,000
Exit costs, total cost incurred	1,401,000		1,401,000
Contract Termination Costs [Abstract]
Additions	657,000	514,000	719,000	514,000
Exit liabilities, end of period	126,000		126,000
Employee Termination Costs [Member]
Exit Costs [Line Items]
Exit costs, incurred	304,000	499,000	304,000	499,000
Exit costs, cumulative	919,000		919,000
Exit costs, total cost incurred	919,000		919,000
Other Associated Costs [Member]
Exit Costs [Line Items]
Exit costs, incurred	353,000	15,000	415,000	15,000
Exit costs, cumulative	482,000		482,000
Exit costs, total cost incurred	482,000		482,000
Termination Costs [Member]
Exit Costs [Abstract]
Current liability related to employee termination benefits	126,000		126,000
Contract Termination Costs [Abstract]
Exit liabilities, beginning of period			112,000
Additions			126,000
Payments			(112,000)
Exit liabilities, end of period	$ 126,000		$ 126,000