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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, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Share-based Compensation Continuing Operations |  |  | $ 7,026 | $ 4,350 | $ 4,962
Deferred Tax Expense from Stock Options Exercised |  |  | $ 1,900 | 1,100 | 1,200
Defined Contribution Plan Company Stock Held in Plan (in shares) |  |  | 365,330 |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total |  |  | $ 5,200 |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  | 1 year 5 months 23 days |  |
Stock Reserved for Employee Stock Purchase Plan (in shares) |  |  | 62,484 |  |
Executive Compensation Plan [Member] |  |  |  |  |
Share-based Compensation Continuing Operations |  |  | $ 300 | 300 | 300
Share-based Compensation Arrangement by Share-based Payment Award Equity Instruments Other than Options Vested in Period Aggregate Intrinsic Value |  |  | (1,000) | $ 900 | $ 1,600
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 3 months 18 days |  |
Percent of Participants Annual Incentive Compensation Participants May Elect to Defer Maximum |  |  |  | 50.00% |
Expiration of Restrictions on Units (Year) |  |  |  | 3 years |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) |  |  | 32,387 | 34,950 |
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) |  |  | 11,132 | 7,698 | 5,622
Stock Issued During Period Average Price (in dollars per share) |  |  | $ 52.57 | $ 65.63 | $ 86.01
Restricted Stock [Member] |  |  |  |  |
Share-based Compensation Continuing Operations |  |  | $ 4,200 | $ 3,700 | $ 3,700
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 75,505 | 70,085 | 51,792
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) |  |  | $ 71.38 | $ 102.74 | $ 93.73
Share-based Compensation Arrangement by Share-based Payment Award Equity Instruments Other than Options Vested in Period Aggregate Intrinsic Value |  |  | $ (500) | $ 900 | $ 800
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) |  |  | 146,015 | 128,042 |
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) |  |  | $ 74.37 | $ 110.22 | $ 96.56
Performance Stock Units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 42,976 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) |  |  | 79,312 | 69,052 |
Performance Stock Units [Member] | Executive Compensation Plan [Member] |  |  |  |  |
Share-based Compensation Continuing Operations |  |  | $ 2,900 | $ 300 | $ 900
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 | $ 91.75
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total |  |  | $ 2,900 |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  | 1 year 3 months 18 days |  |

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- Definition The maximum percentage of employees' annual incentive compensation in restricted stock, which is purchased at a discount to the market, that they may elect to defer. + References No definition available. + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Discount rate from fair value on purchase date that participants pay for shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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