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Marketable Securities (Details 3) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Debt securities, available-for-sale |  |
Less than 12 Months, fair value | $ 74,431 | $ 338,605
Less than 12 months, gross unrealized loss | (58) | (1,071)
12 months or greater, fair value | 112,147 | 0
12 months or greater, gross unrealized losses | (3,566) | 0
Fair value | 186,578 | 338,605
Gross unrealized losses | (3,624) | (1,071)
U.S. Government bonds and notes |  |
Debt securities, available-for-sale |  |
Less than 12 Months, fair value | 28,893 | 82,822
Less than 12 months, gross unrealized loss | (23) | (301)
12 months or greater, fair value | 62,588 | 0
12 months or greater, gross unrealized losses | (1,857) | 0
Corporate notes, bonds and commercial paper |  |
Debt securities, available-for-sale |  |
Less than 12 Months, fair value | 45,538 | 255,783
Less than 12 months, gross unrealized loss | (35) | (770)
12 months or greater, fair value | 49,559 | 0
12 months or greater, gross unrealized losses | $ (1,709) | $ 0

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