Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Nov. 30, 2012
Letters of Credit Pledged as Collateral Towards Workers Compensation		$ 2,855,000
Decrease in Letter of Credit Required Collateral			2,713,000
Pledged Financial Instruments, Not Separately Reported, Securities for Letter of Credit Facilities	548,000	548,000
Allowance for Doubtful Accounts Receivable	183,000	273,000
Inventory Valuation Reserves	924,000	972,000
Trading Securities, Unrealized Holding Gain	5,000	207,000
Trading Securities, Realized Gain	10,000	287,000
Shipping, Handling and Transportation Costs	$ 2,257,000	$ 2,157,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	40,000	40,000
Convertible Preferred Stock, Shares Issued upon Conversion	36,000	36,000
Exchange Rate on Foreign Currency Translation and Transactions	$ 0.95	$ 1.01
Entity Wide Information On Geographic Areas Sales From External Customers Percentage Attributed To Foreign Countries	7.00%	7.00%
Entity Wide Information on Geographic Areas Trade Accounts Receivable from External Customers Percentage Attributed to Foreign Countries	5.00%	4.00%
Percentage of Revenue Per Entity, Maximum	10.00%	10.00%
Concentration Risk, Percentage	6.00%	7.00%
Building and Building Improvements [Member]
Property, Plant and Equipment, Useful Life	25 years
Land Improvements [Member]
Property, Plant and Equipment, Useful Life	25 years
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	8 years