Significant Accounting Policies - Additional Information (Details) - USD ($)	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
Significant Accounting Policies [Line Items]
Allowance for Doubtful Accounts Receivable	$ 161,000	$ 174,000
Inventory Valuation Reserves	1,578,000	1,764,000
Fair Value Estimate Not Practicable Securities Sold Not Yet Purchasess	0	2,916,000
Restricted Cash and Cash Equivalents, Current	10,000	2,916,000
Company's obligations	0
Cost of Revenue	177,177,000	163,868,000
Advertising Expense	$ 415,000	$ 486,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	40,000	40,000	40,000
Convertible Preferred Stock, Shares Issued upon Conversion	36,000	36,000	36,000
Exchange Rate On Foreign Currency Translation And Transactions	$ 0.79	$ 0.77
Operating Lease, Right-of-Use Asset	$ 11,084,000	$ 12,810,000
Maximum percentage of freight revenues		1.00%	1.00%
Canada
Significant Accounting Policies [Line Items]
Exchange Rate On Foreign Currency Translation And Transactions	$ 0.79	$ 0.74
Percentage of Total Assets Held Outside of Countries	3.00%	4.00%
Shipping and Handling [Member]
Significant Accounting Policies [Line Items]
Cost of Revenue	$ 4,281,000	$ 4,087,000
Building
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	35 years
Furniture, Fixtures And Equipment | Minimum
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Furniture, Fixtures And Equipment | Maximum
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	7 years