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Significant Accounting Policies (Details Textual) (USD $)
3 Months Ended 6 Months Ended
Feb. 28, 2013
Feb. 29, 2012
Feb. 28, 2013
Feb. 29, 2012
Aug. 31, 2012
Letters of Credit Pledged as Collateral Towards Workers Compensation $ 2,713,000   $ 2,713,000   $ 2,855,000
Pledged Financial Instruments, Not Separately Reported, Securities for Letter of Credit Facilities 549,000   549,000   548,000
Restricted Cash and Cash Equivalents 723,000   723,000   0
Allowance for Doubtful Accounts Receivable 183,000   183,000   273,000
Inventory Valuation Reserves $ 910,000   $ 910,000   $ 972,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 40,000 40,000 40,000 40,000  
Convertible Preferred Stock, Shares Issued upon Conversion 36,000 36,000 36,000 36,000  
Exchange Rate on Foreign Currency Translation and Transactions $ 1.00 $ 0.99 $ 1.01 $ 1.01  
Entity Wide Information on Geographic Areas Trade Accounts Receivable from External Customers Percentage Attributed to Foreign Countries 7.00% 7.00% 7.00% 7.00%  
Entity Wide Information on Geographic Areas Revenue from External Customers Percentage Attributed to Foreign Countries 5.00%   5.00%   4.00%
Percentage of Revenue Per Entity, Maximum 10.00% 10.00% 10.00% 10.00%