Income Taxes (Narrative) (Details) - USD ($)	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Gross tax contingency reserve	$ 925,000	$ 1,253,000	$ 968,000
Accrued tax liabilities included in the gross tax contingency reserve	400,000
Accrued interest and penalties included in the gross tax contingency reserve	507,000	529,000
Gross tax contingency reserve, classified as current liabilities	0
Gross tax contingency reserve, classified as noncurrent liabilities	925,000	1,253,000
Federal [Member]
Income Tax Authority [Line Items]
Prepaid income taxes		5,100,000
State and Local Jurisdiction
Income Tax Authority [Line Items]
Prepaid income taxes	$ 1,900,000	$ 1,100,000