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Note 11 - Income Taxes - Open Income Tax Years (Details) | 12 Months Ended
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Jun. 30, 2020
Revenue Commissioners, Ireland [Member] |
Open Tax Year | 2020

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- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
Name: | us-gaap_OpenTaxYear
Namespace Prefix: | us-gaap_
Data Type: | us-types:gYearListItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_IncomeTaxAuthorityNameAxis=us-gaap_RevenueCommissionersIrelandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |