Nature of Business and Summary of Significant Accounting Policies - Cash and Cash Equivalents and Investments (Details) - USD ($)	Mar. 31, 2024	Jun. 30, 2023
Accounting policies
Short-term time deposits	$ 36,106,000	$ 15,242,000
Cash	19,412,000	20,713,000
Certificate of Deposits	5,340,000	15,179,000
Money Market Fund	30,766,000	63,000
Cash and Cash Equivalents, at Carrying Value, Total	55,518,000	35,955,000
Investments - other	26,671,000	25,660,000
Certificate of Deposits
Accounting policies
Investments - other	$ 26,671,000	$ 25,660,000
Cash and Cash Equivalents
Accounting policies
Interest Rate	4.65%
Cost	$ 5,313,000
Cash and Cash Equivalents | Minimum
Accounting policies
Interest Rate	4.65%
Cash and Cash Equivalents | Carrying Value
Accounting policies
Carrying Value	$ 5,340,000
Interest-Bearing Deposits
Accounting policies
Cost	$ 26,484,000
Interest-Bearing Deposits | Minimum
Accounting policies
Interest Rate	4.55%
Interest-Bearing Deposits | Maximum
Accounting policies
Interest Rate	5.40%
Interest-Bearing Deposits | Carrying Value
Accounting policies
Carrying Value	$ 26,671,000