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Income Taxes (Narrative) (Details) - USD ($)
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Income Tax Disclosure [Abstract]      
Gross tax contingency reserve $ 802,000 $ 858,000 $ 925,000
Accrued tax liabilities included in the gross tax contingency reserve 300,000    
Accrued interest and penalties included in the gross tax contingency reserve 484,000 494,000  
Gross tax contingency reserve, classified as current liabilities 0    
Gross tax contingency reserve, classified as noncurrent liabilities 802,000 858,000  
Federal [Member]      
Income Tax Authority [Line Items]      
Prepaid income taxes 800,000 3,300,000  
State and Local Jurisdiction      
Income Tax Authority [Line Items]      
Prepaid income taxes   $ 800,000  
Accrued income taxes $ 300,000