Note 3 - Investments - Schedule of Allowance for Credit Loss on Held to Maturity Investments (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2026		Jun. 30, 2025
Balance		$ 52	[1]	$ 132
Allowance for credit losses	[2]	(24)		(80)
Balance	[1]	$ 28		$ 52

[1] Held-to-maturity debt investments are carried at amortized cost, net of allowance for credit losses, and the fair value is classified as Level 2 according to the fair value hierarchy.

[2] Represents the change in present value attributable to the passage of time included in interest income.