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Significant Accounting Policies - Additional Information (Details)
12 Months Ended
Aug. 31, 2019
USD ($)
¥ / shares
shares
Aug. 31, 2019
USD ($)
$ / shares
shares
Aug. 31, 2018
USD ($)
¥ / shares
shares
Aug. 31, 2018
USD ($)
$ / shares
shares
Sep. 01, 2019
USD ($)
Significant Accounting Policies [Line Items]          
Allowance for Doubtful Accounts Receivable $ 169,000 $ 169,000 $ 111,000 $ 111,000  
Inventory Valuation Reserves 1,290,000 $ 1,290,000 839,000 $ 839,000  
Percentage of Revenue Per Entity, Maximum   10.00%   10.00%  
Fair Value Estimate Not Practicable Securities Sold Not Yet Purchasess 655,000 $ 655,000 933,000 $ 933,000  
Restricted Cash and Cash Equivalents, Current $ 655,000 655,000 $ 933,000 933,000  
Shipping Handling And Transportation Cost   4,083,000   3,293,000  
Advertising Expense   $ 392,000   $ 403,000  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares   40,000   40,000  
Convertible Preferred Stock, Shares Issued upon Conversion | shares 36,000 36,000 36,000 36,000  
Exchange Rate On Foreign Currency Translation And Transactions | (per share) $ 0.75 $ 0.75 $ 0.77 $ 0.79  
Concentration Risk, Percentage   100.00%   100.00%  
Maximum percentage of freight revenues   1.00%   1.00%  
Accounting Standards Update 2016-02 [Member] | Restatement Adjustment [Member]          
Significant Accounting Policies [Line Items]          
Operating Lease, Right-of-Use Asset         $ 13,700,000
Operating Lease, Liability         $ 13,900,000
Sales Revenue, Net [Member]          
Significant Accounting Policies [Line Items]          
Concentration Risk, Percentage   9.00%   9.00%  
Sales Revenue, Net [Member] | Canada [Member]          
Significant Accounting Policies [Line Items]          
Concentration Risk, Percentage   4.00%   4.00%  
Accounts Receivable [Member]          
Significant Accounting Policies [Line Items]          
Concentration Risk, Percentage   12.00%   11.00%  
Building [Member]          
Significant Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life   35 years      
Furniture, Fixtures And Equipment [Member] | Minimum [Member]          
Significant Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life   5 years      
Furniture, Fixtures And Equipment [Member] | Maximum [Member]          
Significant Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life   7 years