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Significant Accounting Policies and Significant Recent Accounting Pronouncements (Details) - USD ($)
3 Months Ended
Nov. 30, 2020
Nov. 30, 2019
Aug. 31, 2020
Significant Accounting Policies [Line Items]      
Allowance for Doubtful Accounts Receivable $ 134,000   $ 169,000
Inventory Valuation Reserves 1,641,000   1,532,000
Restricted Cash and Cash Equivalents, Current $ 3,202,000   2,916,000 [1]
Exchange Rate On Foreign Currency Translation And Transactions $ 0.76 $ 0.76  
Percentage of Revenue Per Entity, Maximum 10.00% 10.00%  
Operating Lease, Right-of-Use Asset $ 12,393,000   $ 12,810,000 [1]
Sales Revenue, Net      
Significant Accounting Policies [Line Items]      
Concentration Risk, Percentage 10.00% 9.00%  
Sales Revenue, Net | Canada      
Significant Accounting Policies [Line Items]      
Concentration Risk, Percentage 38.00% 38.00%  
Sales Revenue, Net | Asia      
Significant Accounting Policies [Line Items]      
Concentration Risk, Percentage 54.00% 47.00%  
Accounts Receivable      
Significant Accounting Policies [Line Items]      
Concentration Risk, Percentage 13.00% 12.00%  
[1] *      Derived from the Company’s audited financial statements included in its Form 10K for the year ended August 31, 2020 filed with the U. S. Securities and Exchange Commission on November 30, 2020.