Stock Compensation Information (Summary Of Remaining Unrecognized Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013
Schedule Of Employee Service Share-Based Compensation, Allocation Of Not Yet Recognized Period Costs [Line Items]
Nonvested equity awards outstanding, unrecognized compensation expense	$ 299
Remainder Of 2014 [Member]
Schedule Of Employee Service Share-Based Compensation, Allocation Of Not Yet Recognized Period Costs [Line Items]
Nonvested equity awards outstanding, unrecognized compensation expense	112
2015 [Member]
Schedule Of Employee Service Share-Based Compensation, Allocation Of Not Yet Recognized Period Costs [Line Items]
Nonvested equity awards outstanding, unrecognized compensation expense	94
2016 [Member]
Schedule Of Employee Service Share-Based Compensation, Allocation Of Not Yet Recognized Period Costs [Line Items]
Nonvested equity awards outstanding, unrecognized compensation expense	69
2017 [Member]
Schedule Of Employee Service Share-Based Compensation, Allocation Of Not Yet Recognized Period Costs [Line Items]
Nonvested equity awards outstanding, unrecognized compensation expense	22
2018 [Member]
Schedule Of Employee Service Share-Based Compensation, Allocation Of Not Yet Recognized Period Costs [Line Items]
Nonvested equity awards outstanding, unrecognized compensation expense	$ 2