Note 2 - Investments - Unrealized Gains and Losses (Details) - USD ($) $ in Thousands		3 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
Net gains (losses) recognized during the period on equity securities		$ (1,917)	$ (549)
Less: Net gains (losses) recognized during the period on equity securities sold during the period		0	1,809
Net unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date (1)	[1]	$ (1,917)	$ (2,358)

[1] Includes $1.8 million for the three months ended September 30, 2022, of net losses as a result of the measurement alternative. There were no net gains (losses) as a result of the measurement alternative for the three months ended September 30, 2021.