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Note 16 - Employee Benefit Plans - Asset Allocation (Details)	Jun. 30, 2022	Jun. 30, 2021
UNITED STATES
Asset allocations	100.00%	100.00%
Foreign Plan [Member]
Asset allocations	100.00%	100.00%
Equity Securities [Member] \| UNITED STATES
Asset allocations	33.00%	36.00%
Equity Securities [Member] \| Foreign Plan [Member]
Asset allocations	6.00%	5.00%
Debt Securities [Member] \| UNITED STATES
Asset allocations	48.00%	43.00%
Debt Securities [Member] \| Foreign Plan [Member]
Asset allocations	78.00%	70.00%
Hedge Funds, Global Opportunity [Member] \| UNITED STATES
Asset allocations	11.00%	12.00%
Hedge Funds, Global Opportunity [Member] \| Foreign Plan [Member]
Asset allocations	15.00%	24.00%
Other Debt Obligations [Member] \| UNITED STATES
Asset allocations	8.00%	9.00%
Other Debt Obligations [Member] \| Foreign Plan [Member]
Asset allocations	1.00%	1.00%