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Note 3 - Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 22, 2022	Jun. 30, 2021
Debt Securities, Available-for-sale, Adjusted Cost		$ 27,372	$ 27,374
Debt Securities, Available-for-sale, Unrealized Gain	$ 0		0
Debt Securities, Available-for-sale, Unrealized Loss	(1,199)		(23)
Debt Securities, Available-for-sale, Fair Value	26,173		27,351
Corporate & Government Debt Mutual Funds Securities [Member]
Debt Securities, Available-for-sale, Adjusted Cost		19,997	19,998
Debt Securities, Available-for-sale, Unrealized Gain	0		0
Debt Securities, Available-for-sale, Unrealized Loss	(806)		(13)
Debt Securities, Available-for-sale, Fair Value	19,191		19,985
Corporate & Government Debt ETFs Securities [Member]
Debt Securities, Available-for-sale, Adjusted Cost		$ 7,375	7,376
Debt Securities, Available-for-sale, Unrealized Gain			0
Debt Securities, Available-for-sale, Unrealized Loss	(393)		(10)
Debt Securities, Available-for-sale, Fair Value	$ 6,982		$ 7,366

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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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