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Note 7 - Marketable Securities - Available-for-sale Marketable Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Marketable securities | $ 131,602 | $ 132,695
Corporate Bonds [Member] |  |
Available For Sale Securities Debt Maturities Within One Year Amortized Cost | 51,319 | 27,690
Available-for-sale - matures within one year, Gross unrealized gains | 19 | 4
Available-for-sale - matures within one year, Gross unrealized losses | (673) | (243)
Available-for-sale- matures within one year, Fair Value | 50,665 | 27,451
Available-for-sale - matures after one year through five years, amortized cost | 83,558 | 108,700
Available-for-sale - matures after one year through five years, Gross unrealized gains | 91 | 278
Available for Sale Matures after One Year Through Five Years, Gross Unrealized Loss | (2,712) | (3,734)
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value | 80,937 | 105,244
Debt Securities, Available-for-Sale, Amortized Cost | 134,877 | 136,390
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax | 110 | 282
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (3,385) | (3,977)
Marketable securities | $ 131,602 | $ 132,695

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