Note 6 - Fair Value Measurement - Schedule of Fair Value Measurement of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Jun. 30, 2025
Debt Securities, Available-for-sale	$ 2,947	$ 15,108
Corporate & Government Debt Mutual Funds Securities [Member]
Debt Securities, Available-for-sale	2,947	9,879
Corporate & Government Debt ETFs Securities [Member]
Debt Securities, Available-for-sale	0	5,229
Reported Value Measurement [Member]
Debt Securities, Available-for-sale	2,947	15,108
Reported Value Measurement [Member] \| Corporate & Government Debt Mutual Funds Securities [Member]
Debt Securities, Available-for-sale	2,947	9,879
Reported Value Measurement [Member] \| Corporate & Government Debt ETFs Securities [Member]
Debt Securities, Available-for-sale	0	5,229
Reported Value Measurement [Member] \| Time Deposits [Member]
Debt Securities, Available-for-sale	0	0
Estimate of Fair Value Measurement [Member]
Debt Securities, Available-for-sale	2,947	15,108
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-sale	2,947	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]
Debt Securities, Available-for-sale	2,947	9,879
Estimate of Fair Value Measurement [Member] \| Corporate & Government Debt Mutual Funds Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-sale	2,947	9,879
Estimate of Fair Value Measurement [Member] \| Corporate & Government Debt Mutual Funds Securities [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] \| 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]
Debt Securities, Available-for-sale	0	5,229
Estimate of Fair Value Measurement [Member] \| Corporate & Government Debt ETFs Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-sale	0	5,229
Estimate of Fair Value Measurement [Member] \| Corporate & Government Debt ETFs Securities [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] \| Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-sale	0	0
Estimate of Fair Value Measurement [Member] \| Time Deposits [Member]
Debt Securities, Available-for-sale		0
Estimate of Fair Value Measurement [Member] \| Time Deposits [Member] \| Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-sale	0	0
Estimate of Fair Value Measurement [Member] \| Time Deposits [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-sale	0	0
Estimate of Fair Value Measurement [Member] \| Time Deposits [Member] \| Fair Value, Inputs, Level 3 [Member]
Debt Securities, Available-for-sale	$ 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