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Note 11 - Income Taxes - Open Income Tax Years (Details)	12 Months Ended
	Jun. 30, 2023
Internal Revenue Service (IRS) [Member] | Minimum [Member]
Open Tax Year	2020
Internal Revenue Service (IRS) [Member] | Maximum [Member]
Open Tax Year	2023
Canada Revenue Agency [Member] | Minimum [Member]
Open Tax Year	2019
Canada Revenue Agency [Member] | Maximum [Member]
Open Tax Year	2023
Federal Ministry of Finance, Germany [Member] | Minimum [Member]
Open Tax Year	2020
Federal Ministry of Finance, Germany [Member] | Maximum [Member]
Open Tax Year	2023
Revenue Commissioners, Ireland [Member]
Open Tax Year	2023
Portuguese Tax Authority [Member] | Minimum [Member]
Open Tax Year	2022
Portuguese Tax Authority [Member] | Maximum [Member]
Open Tax Year	2023
Her Majesty's Revenue and Customs (HMRC) [Member] | Minimum [Member]
Open Tax Year	2019
Her Majesty's Revenue and Customs (HMRC) [Member] | Maximum [Member]
Open Tax Year	2023

X

- Definition

Tax year that remains open to examination under enacted tax laws, in YYYY format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-15

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:gYearListItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
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X

- Details

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X

- Details

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X

- Details

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X

- Details

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X

- Details

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X

- Details

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X

- Details

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