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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
	Nov. 30, 2018	Nov. 30, 2017
Earnings Per Share [Abstract]
Net earnings	$ 1,212	$ 3,185
Weighted average shares outstanding	10,766	10,705
Diluted effect of stock awards	40	35
Weighted average shares outstanding assuming dilution	10,806	10,740
Basic net earnings per share	$ 0.11	$ 0.30
Diluted net earnings per share	$ 0.11	$ 0.30

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