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Note 16 - Employee Benefit Plans - Asset Allocation (Details)	Jun. 30, 2024	Jun. 30, 2023
UNITED STATES
Asset allocations	99.00%	100.00%
Foreign Plan [Member]
Asset allocations	100.00%	100.00%
Equity Securities [Member] \| UNITED STATES
Asset allocations	35.00%	35.00%
Equity Securities [Member] \| Foreign Plan [Member]
Asset allocations	0.00%	0.00%
Debt Securities [Member] \| UNITED STATES
Asset allocations	42.00%	44.00%
Debt Securities [Member] \| Foreign Plan [Member]
Asset allocations	69.00%	67.00%
Hedge Funds, Global Opportunity [Member] \| UNITED STATES
Asset allocations	11.00%	12.00%
Hedge Funds, Global Opportunity [Member] \| Foreign Plan [Member]
Asset allocations	1.00%	3.00%
Other Debt Obligations [Member] \| UNITED STATES
Asset allocations	11.00%	9.00%
Other Debt Obligations [Member] \| Foreign Plan [Member]
Asset allocations	30.00%	30.00%