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Note 18 - Share-based Compensation - Nonvested Share Activity (Details) - $ / shares	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Nonvested options (in shares)	29,733
Nonvested options, weighted average exercise price (in dollars per share)	$ 23.09
Granted options (in shares)	14,330	23,970	25,410
Granted options, weighted average exercise price (in dollars per share)	$ 34.89	$ 25.03	$ 23.61
Vested options (in shares)	(13,594)
Vested options, weighted average exercise price (in dollars per share)	$ 21.09
Canceled (forfeited) options (in shares)	0
Canceled (forfeited) options, weighted average exercise price (in dollars per share)	$ 0
Nonvested options (in shares)	30,469	29,733
Nonvested options, weighted average exercise price (in dollars per share)	$ 29.54	$ 23.09

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

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X

- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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X

- Definition

Number of non-vested options outstanding.

+ References

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X

- Definition

Number of non-vested options forfeited.

+ References

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X

- Definition

Weighted average grant-date fair value of non-vested options forfeited.

+ References

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- Definition

Weighted average grant-date fair value of non-vested options outstanding.

+ References

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- Definition

Number of options vested.

+ References

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- Definition

Weighted average grant-date fair value of options vested.

+ References

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