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Note 13 - Stock-based Compensation and Purchase Plans (Tables)

12 Months Ended

Jun. 30, 2023

Notes Tables

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

		Restricted Stock Awards
						Weighted
		Number				Average
		of				Grant Date
		Shares				Fair Value
Outstanding, June 30, 2022			141,654			$	78.19
Granted			55,781				95.32
Vested			(82,164	)			73.72
Canceled			(11,335	)			90.12
Outstanding, June 30, 2023			103,936			$	89.38

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		2023				2022				2021
Risk-free interest rates			4.52	%			0.46	%			0.18	%
Expected life of option grants (in years)			3				3				3
Expected volatility of underlying stock			29.5	%			46.7	%			44.1	%
Expected quarterly dividends (per share)		$	0.28			$	0.24			$	0.22

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

		Annual Component												Performance Stock Units
						Weighted												Weighted
		Number				Average				Aggregate				Number				Average
		of				Exercise				Intrinsic				of				Grant Date
		Shares				Price				Value				Shares				Fair Value
Non-vested, June 30, 2022			53,107			$	57.06			$	346,496				142,170			$	72.68
Granted			22,322				63.59								52,972				89.44
Exercised / vested			(12,915	)			51.99			$	587,859				(53,224	)			70.37
Forfeited			(5,056	)			59.36								(14,875	)			81.02
Non-vested, June 30, 2023			57,458			$	60.53			$	2,582,995				127,043			$	79.66

X

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

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-Name Accounting Standards Codification
-Paragraph 2
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-Publisher FASB
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- Definition

Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

+ References

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