Property And Equipment (Schedule Of Property And Equipment, Net) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2014	Aug. 31, 2014
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	$ 30,238	$ 29,355
Less: accumulated depreciation and amortization	(20,115)	(19,653)
Total	10,123	9,702
Machinery, Equipment and Vehicles [Member]
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	14,049	13,459
Building and Building Improvements [Member]
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	3,956	4,044
Computer And Office Equipment [Member]
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	3,687	3,312
Software and Software Development Costs [Member]
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	6,860	6,824
Furniture and Fixtures [Member]
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	1,401	1,421
Land [Member]
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	$ 285	$ 295