Note 2 - Investments - Unrealized Gains and Losses (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Net gains and losses recognized during the period		$ (132)	$ 358	$ (99)	$ (904)
Less: Net gains and losses recognized during the period on securities sold during the period		0	79	0	35
Unrealized gains and losses recognized during the reporting period on securities still held at the reporting date (1)	[1]	(132)	279	(99)	(939)
Net gains and losses recognized during the period		(89)	46	(49)	46
Less: Net gains and losses recognized during the period on securities sold during the period		0	0	0	0
Corporate debt securities, Unrealized gains (losses)		$ (89)	$ 46	$ (49)	$ 46

[1] Includes net unrealized and realized losses of $775,000 as a result of the measurement alternative for the six months ended December 31, 2023. There were no amounts included as a result of the measurement alternative for the three and six months ended December 31, 2024, or for the three months ended December 31, 2023.