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Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Effective Income Tax Rate Before Discretion, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |
Deferred Tax Liabilities, Previously Undistributed Foreign Earnings | $ 1,200 |  |
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount | 1,200 |  |
Effective Income Tax Rate Reconciliation, Mix of Income in Various Jurisdictions | 1,400 |  |
Effective Income Tax Rate Reconciliation, Release of Uncertain Tax Provision Reserves | 700 |  |
Effective Income Tax Rate Reconciliation, GILTI | 800 |  |
Effective Income Tax Rate Reconciliation, Section 965 Toll Tax, Amount |  | $ 800 | $ 11,700
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  | 300 | 1,300
Effective Income Tax Rate Reconciliation, Anticipated Cash Repatriation, Amount |  | 2,100 | 7,800
Income Tax Expense (Benefit), Total | 13,060 | 18,688 | $ 38,026
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 8,400 |  |
Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 100 | $ 100 |
Accounting Standards Update 2016-09 [Member] |  |  |
Income Tax Expense (Benefit), Total | 200 |  |
State and Local Jurisdiction [Member] |  |  |
Operating Loss Carryforwards, Total | 79,500 |  |
Tax Credit Carryforward, Amount | 3,400 |  |
Foreign Tax Authority [Member] |  |  |
Operating Loss Carryforwards, Total | 4,400 |  |
Operating Loss Carryforwards, Subject to Expiration | 3,500 |  |
Operating Loss Carryforwards, Not Subject to Expiration | 900 |  |
Deferred Tax Related to Sale of Segment [Member] |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ 1,800 |  |

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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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- 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 research tax credit. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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