Note 4 - Investments - Schedule of Allowance for Credit Loss on Held to Maturity Investments (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2024		Jun. 30, 2023
Balance	[1]	$ 0
Allowance for credit losses		(100)	[2]	$ 0
Balance	[1]	132		0
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance		$ 232
Balance				$ 232

[1] Held-to-maturity debt instruments 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.