Consolidated Balance Sheets Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Aug. 25, 2018	Aug. 26, 2017
Statement of Financial Position [Abstract]
Receivables, less allowance for doubtful accounts	$ 197	$ 183
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000	10,000
Preferred stock, shares issued (in shares)	0	0
Capital stock common, par value (in dollars per share)	$ 0.50	$ 0.5
Capital stock common, shares authorized (in shares)	60,000	60,000
Capital stock common, shares issued (in shares)	51,776	51,766
Treasury stock, at cost, shares (in shares)	20,243	20,183

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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