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Note 10 - Income Taxes (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Effective Income Tax Rate Before Discretion, at Federal Statutory Income Tax Rate, Percent |  | 28.00% |  |
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability | $ 56,000 | $ 1,340,000 |  |
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount | 1,490,000 |  |  |
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | (540,000) | $ (11,700,000) |  |
Tax Period, Repatriation of Foreign Earnings |  | 8 years |  |
Effective Income Tax Rate Reconciliation, Anticipated Cash Repatriation, Amount |  | $ 7,800,000 |  |
Effective Income Tax Rate Reconciliation, Section 965 Toll Tax, Amount |  | 11,700,000 |  |
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount |  |  | $ 600,000 | $ 700,000
Effective Income Tax Rate Reconciliation, Income Tax Rate Differential, Other Jurisdictions, Amount |  |  | (5,300,000) | (4,900,000)
Effective Income Tax Rate Reconciliation, Disposition of Asset, Amount |  |  |  | (900,000)
Income Tax Expense (Benefit), Total |  | 40,620,000 | 15,355,000 | $ 16,295,000
Deferred Tax Liabilities, Previously Undistributed Foreign Earnings | 4,200,000 | 4,200,000 |  |
Deferred Tax Liabilities, Current Undistributed Foreign Earnings | 3,100,000 | 3,100,000 |  |
Estimated Income Tax Liability for Undistributed Foreign Earnings | 1,800,000 | 1,800,000 |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 2,500,000 | 2,500,000 |  |
Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 100,000 | 100,000 | 100,000 |
Accounting Standards Update 2016-09 [Member] |  |  |  |
Income Tax Expense (Benefit), Total |  | (395) | $ (600,000) |
State and Local Jurisdiction [Member] |  |  |  |
Operating Loss Carryforwards, Total | 61,600,000 | 61,600,000 |  |
Tax Credit Carryforward, Amount | 2,500,000 | 2,500,000 |  |
Foreign Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards, Total | 3,100,000 | 3,100,000 |  |
Foreign Tax Authority [Member] | Indefinite Lived [Member] |  |  |  |
Operating Loss Carryforwards, Total | 2,400,000 | 2,400,000 |  |
Foreign Tax Authority [Member] | Ten Years [Member] |  |  |  |
Operating Loss Carryforwards, Total | $ 700,000 | $ 700,000 |  |

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- Definition Amount of deferred tax liability attributable to taxable temporary differences from previously undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity. + References No definition available. + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the mix of income earned in jurisdictions with beneficial tax rates. + References No definition available. + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the impact of the Sec. 965 toll tax. + References No definition available. + Details
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