Note 3 - Investments - Unrealized Gains and Losses (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2026	Jun. 30, 2025
Net gains and losses recognized during the period		$ 2,579	$ (281)
Less: Net gains and losses recognized during the period on securities sold during the period		(5)	(17)
Unrealized gains and losses recognized during the reporting period on securities still held at the reporting date 1	[1]	2,584	(264)
Net gains and losses recognized during the period		152	(146)
Less: Net gains and losses recognized during the period on securities sold during the period		152	0
Corporate debt securities, Unrealized gains (losses)	[2]	$ 0	$ (146)

[1] Includes a net gain of $3.2 million in fiscal 2026 and a net loss of $362,000 in fiscal 2025 recognized under the measurement alternative, reflecting unrealized and realized investment gains and losses.

[2] In December 2025, senior notes were mandatorily exchanged for equity securities of the issuer pursuant to a court-approved restructuring. Accordingly, the investment is presented within equity securities at the reporting date, and prior-period amounts are reflected within debt securities classified as trading. The exchange was a non-cash, nonrecognition transaction.