Description of Business and Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Reserves deducted from accounts receivable:
Allowance for doubtful accounts, Balance at beginning of year		$ 4
Allowance for doubtful accounts, Additional changed to cost and expenses
Allowance for doubtful accounts, Deductions		$ (4)
Allowance for doubtful accounts, Balance at end of year