v3.25.2
Note 6 - Fair Value Measurement - Schedule of Fair Value Measurement of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Jun. 30, 2024
Debt Securities, Available-for-sale $ 15,108 $ 21,474
Corporate & Government Debt Mutual Funds Securities [Member]    
Debt Securities, Available-for-sale 9,879 14,426
Corporate & Government Debt ETFs Securities [Member]    
Debt Securities, Available-for-sale 5,229 7,048
Reported Value Measurement [Member]    
Debt Securities, Available-for-sale 15,108 21,474
Reported Value Measurement [Member] | Corporate & Government Debt Mutual Funds Securities [Member] | Short-Term Investments [Member]    
Debt Securities, Available-for-sale 9,879 14,426
Reported Value Measurement [Member] | Corporate & Government Debt ETFs Securities [Member] | Short-Term Investments [Member]    
Debt Securities, Available-for-sale 5,229 7,048
Estimate of Fair Value Measurement [Member]    
Debt Securities, Available-for-sale 15,108 21,474
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Debt Securities, Available-for-sale 15,108 21,474
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 9,879 14,426
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 9,879 14,426
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 5,229 7,048
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 5,229 7,048
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