Note 11 - Stock-based Compensation (Details Textual) - USD ($)	3 Months Ended	9 Months Ended
May 31, 2025	May 31, 2024	May 31, 2025	May 31, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 4.95	$ 4.88
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year)			5 years 9 months 7 days	6 years 1 month 9 days
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense	$ 304,510	$ 907,330	$ 343,148	$ 1,038,022
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	1,314,487		$ 1,314,487
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			2 years 3 months
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense	37,366		$ 110,880
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 37,772		$ 37,772
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			3 months

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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