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Note 16 - Employee Benefit Plans - Plan Asset Assumptions (Details)
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 5.60%    
Rate of compensation increase 3.25% 3.30% 3.30%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 6.35%    
Rate of compensation increase 3.25% 3.30% 3.30%
Minimum [Member]      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 2.40% 1.85% 1.48%
Discount rate 1.85% 1.48% 1.37%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 5.40% 4.55% 2.80%
Maximum [Member]      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 5.60% 5.60% 5.60%
Discount rate 5.60% 5.60% 5.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 6.35% 6.50% 6.65%