Supplemental disclosure for statement of cash flows (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Supplemental Cash Flow Elements [Abstract]
Income Taxes Paid	$ 33	$ 46
Interest Paid	161	25
Installment Loans Financed Amount	246	282
Capital Lease Obligation Cost Basis	0	768
Stock Issued During Period, Value, Employee Stock Purchase Plan	636	643
Adjustment to Additional Paid in Capital Stock Option Issued in Lieu of Cash Payment	$ 90