Note 3 - Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Jun. 30, 2024
Debt Securities, Available-for-sale, Adjusted Cost	$ 15,972	$ 22,651
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(864)	(1,177)
Debt Securities, Available-for-sale, Fair Value	15,108	21,474
Financial instrument, short-term investments	15,108	21,474
Financial instrument, long-term investments	0	0
Corporate & Government Debt Mutual Funds Securities [Member]
Debt Securities, Available-for-sale, Adjusted Cost	10,547	15,276
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(668)	(850)
Debt Securities, Available-for-sale, Fair Value	9,879	14,426
Financial instrument, short-term investments	9,879	14,426
Financial instrument, long-term investments	0	0
Corporate & Government Debt ETFs Securities [Member]
Debt Securities, Available-for-sale, Adjusted Cost	5,425	7,375
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(196)	(327)
Debt Securities, Available-for-sale, Fair Value	5,229	7,048
Financial instrument, short-term investments	5,229	7,048
Financial instrument, long-term investments	$ 0	$ 0

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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+ Details