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Note 10 - Fair Value Measurement - Schedule of Fair Value Measurement of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025
Debt Securities, Available-for-sale	$ 11,290	$ 15,108
Corporate & Government Debt Mutual Funds Securities [Member]
Debt Securities, Available-for-sale	6,693	9,879
Corporate & Government Debt ETFs Securities [Member]
Debt Securities, Available-for-sale	4,597	5,229
Reported Value Measurement [Member]
Debt Securities, Available-for-sale	11,290	15,108
Reported Value Measurement [Member] | Corporate & Government Debt Mutual Funds Securities [Member] | Short-Term Investments [Member]
Debt Securities, Available-for-sale	6,693	9,879
Reported Value Measurement [Member] | Corporate & Government Debt ETFs Securities [Member] | Short-Term Investments [Member]
Debt Securities, Available-for-sale	4,597	5,229
Estimate of Fair Value Measurement [Member]
Debt Securities, Available-for-sale	11,290	15,108
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-sale	11,290	15,108
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-sale	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-sale	0	0
Estimate of Fair Value Measurement [Member] | Corporate & Government Debt Mutual Funds Securities [Member] | Short-Term Investments [Member]
Debt Securities, Available-for-sale	6,693	9,879
Estimate of Fair Value Measurement [Member] | Corporate & Government Debt Mutual Funds Securities [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-sale	6,693	9,879
Estimate of Fair Value Measurement [Member] | Corporate & Government Debt Mutual Funds Securities [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-sale	0	0
Estimate of Fair Value Measurement [Member] | Corporate & Government Debt Mutual Funds Securities [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-sale	0	0
Estimate of Fair Value Measurement [Member] | Corporate & Government Debt ETFs Securities [Member] | Short-Term Investments [Member]
Debt Securities, Available-for-sale	4,597	5,229
Estimate of Fair Value Measurement [Member] | Corporate & Government Debt ETFs Securities [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-sale	4,597	5,229
Estimate of Fair Value Measurement [Member] | Corporate & Government Debt ETFs Securities [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-sale	0	0
Estimate of Fair Value Measurement [Member] | Corporate & Government Debt ETFs Securities [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-sale	$ 0	$ 0

X

- Definition

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

+ References

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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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