Note 2 - Investments - Unrealized Gains and Losses (Details) - USD ($) $ in Thousands		3 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Net gains and losses recognized during the period		$ 33	$ (1,261)
Less: Net gains and losses recognized during the period on securities sold during the period		0	(43)
Unrealized gains and losses recognized during the reporting period on securities still held at the reporting date (1)	[1]	33	(1,218)
Net gains and losses recognized during the period		40	0
Less: Net gains and losses recognized during the period on securities sold during the period		0	0
Corporate debt securities, Unrealized gains (losses)		$ 40	$ 0

[1] Includes net unrealized and realized losses as a result of the measurement alternative of $1.0 million and $2.3 million for the fiscal years ended June 30, 2024, and 2023, respectively.