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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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