Note 2 - Investments - Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Net gains and losses recognized during the period on equity securities	$ (937)	$ 498	$ (2,868)	$ (50)
Less: Net gains and losses recognized during the period on equity securities sold during the period	0	(1)	0	183
Unrealized gains and losses recognized during the reporting period on equity securities still held at the reporting date (1)	$ (937)	$ 499	$ (2,868)	$ (233)