Note 8 - Cash Dividends (Details Textual) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Aug. 31, 2023
Payments of Dividends	$ 5.4	$ 5.4
Dividends Accrued	$ 0.1	$ 0.2
Subsequent Event [Member]
Quarterly Indicated Per Share Dividend Rate			$ 0.05

Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-15

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration