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Note 10 - Stockholders' Equity (Details Textual) - $ / shares					12 Months Ended
	Mar. 01, 2023	Sep. 01, 2022	Mar. 01, 2022	Sep. 01, 2021	Aug. 31, 2023	Aug. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross					277,613	174,840
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Including Cashless Exercises					265,209	51,218
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price					$ 6.46	$ 6.6
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period					184,432
Stock Issued During Period, Shares, Employee Stock Purchase Plans	3,566	3,620	2,966	2,636
The 2019 Plan [member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant					426,904
The 2019 Plan [member] | Employees and Directors [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross					277,613	174,840
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Including Cashless Exercises						51,218
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price						$ 6.6
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period						42,071
ESPP [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant					62,035

X

- Definition

Number of share options (or share units) exercised during the current period, including cashless exercises.

+ References

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Gross number of share options (or share units) granted during the period.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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

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