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Note 3 - Fair Value Measurement - Fair Value of Assets Measured on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Money market funds | $ 1,103 | $ 7,363
Money market funds | 1,103 | 7,363
Fair Value, Inputs, Level 1 [Member] |  |
Money market funds | 2 | 6,893
Money market funds | 2 | 6,893
Fair Value, Inputs, Level 2 [Member] |  |
Money market funds | 0 | 0
Money market funds | 0 | 0
Fair Value, Inputs, Level 3 [Member] |  |
Money market funds | 0 | 0
Money market funds | 0 | 0
Money Market Funds [Member] |  |
Money market funds | 2 | 6,893
Money market funds | 2 | 6,893
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Money market funds | 2 | 6,893
Money market funds | 2 | 6,893
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Money market funds | 0 | 0
Money market funds | 0 | 0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Money market funds | 0 | 0
Money market funds | 0 | 0
Demand Deposits [Member] |  |
Money market funds | 29 | 45
Money market funds | 29 | 45
Demand Deposits [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Money market funds | 0 | 0
Money market funds | 0 | 0
Demand Deposits [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Money market funds | 0 | 0
Money market funds | 0 | 0
Demand Deposits [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Money market funds | 0 | 0
Money market funds | 0 | $ 0
Savings Account [Member] |  |
Money market funds | 1,072 |
Money market funds | 1,072 |
Savings Account [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Money market funds | 0 |
Money market funds | 0 |
Savings Account [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Money market funds | 0 |
Money market funds | 0 |
Savings Account [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Money market funds | 0 |
Money market funds | $ 0 |

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Details
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