Term Loans Payable And Revolving Line Of Credit (Information Of Term Loans Payable) (Details)	12 Months Ended
Aug. 31, 2018 USD ($)
Outstanding Principal	$ 12,813,000
Term Loan May 24, 2019 [Member]
Maturity Date	May 24, 2019
Original Principal Amount	$ 15,000,000
Quarterly Principal Payment Amount	938,000
Outstanding Principal	$ 6,563,000
Term Loan August 29, 2019 [Member]
Maturity Date	Aug. 29, 2019
Original Principal Amount	$ 5,000,000
Quarterly Principal Payment Amount	313,000
Outstanding Principal	$ 2,500,000
Term Loan August 29, 2020 [Member]
Maturity Date	Aug. 29, 2020
Original Principal Amount	$ 5,000,000
Quarterly Principal Payment Amount	313,000
Outstanding Principal	$ 3,750,000

Face (par) amount of debt instrument at time of issuance.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of the required periodic payments applied to principal.

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Including the current and noncurrent portions, the carrying value as of the balance sheet date of notes payable to banks, excluding mortgage notes, initially due beyond one year or beyond the operating cycle if longer.

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