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Note 13 - Stock-based Compensation and Purchase Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Apr. 01, 2017	Jul. 01, 2005	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Continuing Operations			$ 8,368	$ 7,026	$ 4,350
Deferred Tax Expense from Stock Options Exercised			$ 1,800	1,900	1,100
Common Stock, Capital Shares Reserved for Future Issuance (in shares)			208,971
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 3,700
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 4 months 17 days
Stock Reserved for Employee Stock Purchase Plan (in shares)			54,975
Executive Compensation Plan [Member]
Share-based Compensation Continuing Operations			$ 400	$ 300	$ 300
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 400
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 4 months 24 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)			7,509	11,132	7,698
Stock Issued During Period Average Price (in dollars per share)			$ 66.98	$ 52.57	$ 65.63
Restricted Stock [Member]
Share-based Compensation Continuing Operations			$ 5,300	$ 4,200	$ 3,700
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)			$ 59.57	$ 71.38	$ 102.74
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value			$ 2,800	$ 2,300	$ 4,500
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)			$ 43.16	$ 74.37	$ 110.22
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)			$ 58.81
Performance Stock Units [Member] | Executive Compensation Plan [Member]
Share-based Compensation Continuing Operations			$ 2,600	$ 2,900	$ 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)				$ 70.37	$ 106.65
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value			700	$ 800	$ 700
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 3,600
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 3 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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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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