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Note 16 - Employee Benefit Plans - Plan Asset Assumptions (Details)
 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 5.60%    
Rate of compensation increase 3.30% 3.30% 3.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 6.40%    
Rate of compensation increase 3.30% 3.30% 3.25%
Minimum [Member]      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 1.85% 1.48% 1.40%
Discount rate 1.48% 1.37% 0.73%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 4.55% 2.80% 2.05%
Maximum [Member]      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 5.60% 5.60% 5.00%
Discount rate 5.60% 5.60% 3.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 6.50% 6.65% 6.80%