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Business Segments and Foreign Operations (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2010
Net Sales by Geography:
Net sales	$ 342,784	$ 336,409	$ 321,516
Long-lived Assets by Geography:
Property and equipment, net	9,063	8,482	9,322
United States [Member]
Net Sales by Geography:
Net sales	144,052	135,025	149,127
Long-lived Assets by Geography:
Property and equipment, net	5,297	5,232	6,379
International [Member]
Long-lived Assets by Geography:
Property and equipment, net	3,766	3,250	2,943
United Kingdom [Member]
Net Sales by Geography:
Net sales	23,402	26,188	22,367
Germany [Member]
Net Sales by Geography:
Net sales	21,092	26,865	23,464
Latin America [Member]
Net Sales by Geography:
Net sales	17,689	18,720	16,609
Other International [Member]
Net Sales by Geography:
Net sales	$ 136,549	$ 129,611	$ 109,949

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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