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Note 5 - Fair Value Measurements - Fair Value of Financial Instruments (Details) - Money Market Funds [Member] - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Estimate of Fair Value Measurement [Member] |  |
Cash equivalents | $ 42,495 | $ 46,061
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Cash equivalents | 42,495 | 46,061
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Cash equivalents | 0 | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Cash equivalents | 0 | 0
Reported Value Measurement [Member] |  |
Cash equivalents | $ 42,495 | $ 46,061

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- Definition Represents the fair value disclosure for cash equivalents as of the balance sheet date. + References No definition available. + Details
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