Income Taxes (Schedule Of Effective Income Tax Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Income Taxes [Abstract]
Effective Income Tax Rate, Continuing Operations	37.00%
Computed income taxes at 37%	$ (235)	$ 218	$ (332)	$ 154
Combined federal and state statutory tax rate	37.00%
Permanent items	(78)	(9)	(24)	(32)
Change in estimated valuation allowance		32		32
Other	39	(15)	(7)	(12)
Income tax benefit (expense)	$ (274)us-gaap_IncomeTaxExpenseBenefit	$ 226us-gaap_IncomeTaxExpenseBenefit	$ (363)us-gaap_IncomeTaxExpenseBenefit	$ 142us-gaap_IncomeTaxExpenseBenefit
Federal statutory tax rate	34.00%

Effective income taxx rate reconciliation, combined federal and state statutory rate.

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Income Tax Reconciliation Permanent Items

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.

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