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Note 13 - Stock-based Compensation and Purchase Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended			24 Months Ended
	Apr. 01, 2017	Jul. 01, 2005	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2023
Share-based Compensation Continuing Operations			$ 11,710	$ 11,168	$ 8,368
Deferred Tax Expense from Stock Options Exercised			$ 1,800	2,700	1,800
Common Stock, Capital Shares Reserved for Future Issuance (in shares)			394,284			394,284
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount			$ 3,500			$ 3,500
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 6 months
Stock Reserved for Employee Stock Purchase Plan (in shares)			42,012
Executive Compensation Plan [Member]
Share-based Compensation Continuing Operations			$ 200	$ 200	$ 400
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount			$ 1,000			$ 1,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)						1 year 2 months 12 days
Percent of Participants Annual Incentive Compensation Participants May Elect to Defer Maximum			50.00%
Expiration of Restrictions on Units (Year)			3 years
Executive Compensation Plan [Member] | Minimum [Member]
Shares of Common Stock Issued Determined by Adjustment of Target Range Percent			50.00%
Executive Compensation Plan [Member] | Maximum [Member]
Shares of Common Stock Issued Determined by Adjustment of Target Range Percent			200.00%
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date	15.00%	5.00%
Percent of Fair Market Value at Which Employees May Purchase Shares of Stock	85.00%
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)			6,256	6,707	7,509
Stock Issued During Period Average Price (in dollars per share)			$ 91.78	$ 83.22	$ 66.98
Restricted Stock [Member]
Share-based Compensation Continuing Operations			$ 4,800	$ 5,000	$ 5,300
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)			$ 95.32	$ 104.37	$ 59.57
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value			$ 7,400	$ 6,800	$ 2,800
Restricted Stock [Member] | Executive Compensation Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)			$ 98.36	$ 108.92	$ 43.16
Performance Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)			$ 89.44
Performance Stock Units [Member] | Executive Compensation Plan [Member]
Share-based Compensation Continuing Operations			$ 6,700	$ 6,000	$ 2,600
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)				$ 102.61	$ 58.81
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value			4,600	$ 400	$ 700
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount			$ 3,700			$ 3,700
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			9 months 18 days

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The amount of time after which the restriction on the units will expire.

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The percentage by which the number of common stock issued will be adjusted upward or downward at the end of the performance period.

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Represents the number of shares of stock that are reserved for the Company's Employee Stock Purchase Plan.

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-Topic 210
-SubTopic 10
-Section S99
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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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Discount rate from fair value on purchase date that participants pay for shares.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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