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Note 8 - Stockholders' Equity (Details Textual) - shares					9 Months Ended
	Mar. 01, 2021	Sep. 01, 2020	Mar. 01, 2020	Sep. 01, 2019	May 31, 2021	May 31, 2020
Stock Repurchased and Retired During Period, Shares (in shares)					0	0
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)	5,225	4,646	2,754	3,597
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)					74,822

X

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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