Income Taxes (Narrative) (Details) - USD ($)	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Gross tax contingency reserve	$ 858,000	$ 925,000	$ 1,253,000
Accrued tax liabilities included in the gross tax contingency reserve	400,000
Accrued interest and penalties included in the gross tax contingency reserve	494,000	507,000
Gross tax contingency reserve, classified as current liabilities	0
Gross tax contingency reserve, classified as noncurrent liabilities	858,000	925,000
Federal [Member]
Income Tax Authority [Line Items]
Prepaid income taxes	3,300,000
State and Local Jurisdiction
Income Tax Authority [Line Items]
Prepaid income taxes	$ 800,000	$ 1,900,000