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Marketable Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Cash equivalents and marketable securities |  |
Fair value | $ 218,489 | $ 398,119
Amortized cost | 222,105 | 399,182
Gross unrealized gains | 8 | 8
Gross unrealized losses | (3,624) | (1,071)
Cash, cash equivalents and marketable securities |  |
Cash, fair value | 94,737 | 87,490
Cash, amortized cost | 94,737 | 87,490
Fair Value | 313,226 | 485,609
Amortized Cost | 316,842 | 486,672
Gross unrealized gains | 8 | 8
Gross unrealized losses | (3,624) | (1,071)
Money market funds |  |
Cash equivalents and marketable securities |  |
Fair value | 15,763 | 7,402
Amortized cost | 15,763 | 7,402
Gross unrealized gains | 0 | 0
Gross unrealized losses | $ 0 | $ 0
Weighted rate of return (as a percentage) | 2.63% | 0.02%
U.S. Government bonds and notes |  |
Cash equivalents and marketable securities |  |
Fair value | $ 96,371 | $ 102,812
Amortized cost | 98,250 | 103,113
Gross unrealized gains | 1 | 0
Gross unrealized losses | $ (1,880) | $ (301)
Weighted rate of return (as a percentage) | 1.73% | 0.29%
Corporate notes, bonds and commercial paper |  |
Cash equivalents and marketable securities |  |
Fair value | $ 106,355 | $ 287,905
Amortized cost | 108,092 | 288,667
Gross unrealized gains | 7 | 8
Gross unrealized losses | $ (1,744) | $ (770)
Weighted rate of return (as a percentage) | 2.59% | 0.22%

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- Definition This item represents the amortized cost of cash, cash equivalents and marketable securities, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. + References No definition available. + Details
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