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Net Earnings Per Share (Schedule Of Computation Of Basic And Diluted Net Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Earnings Per Share [Abstract]
Net earnings	$ 1,735	$ 5,012	$ 4,920	$ 5,885
Weighted average shares outstanding	10,743	10,657	10,724	10,647
Diluted effect of stock awards	22	17	28	23
Weighted average shares outstanding assuming dilution	10,765	10,674	10,752	10,670
Basic net earnings per share	$ 0.16	$ 0.47	$ 0.46	$ 0.55
Diluted net earnings per share	$ 0.16	$ 0.47	$ 0.46	$ 0.55

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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