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Cash Equivalents and Marketable Securities - Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Cash Equivalents and Marketable Securities |  |
Total cash equivalents and marketable securities, Amortized Cost | $ 299,915 | $ 318,713
Total cash equivalents and marketable securities, Gross Unrealized Gains | 2 |
Total cash equivalents and marketable securities, Gross Unrealized Losses | (413) | (143)
Total cash equivalents and marketable securities, Fair Value | 299,504 | 318,570
U.S. Treasury and agency securities |  |
Cash Equivalents and Marketable Securities |  |
Total cash equivalents and marketable securities, Amortized Cost | 77,915 | 40,093
Total cash equivalents and marketable securities, Gross Unrealized Gains | 1 |
Total cash equivalents and marketable securities, Gross Unrealized Losses | (268) | (76)
Total cash equivalents and marketable securities, Fair Value | 77,648 | 40,017
Corporate debt securities |  |
Cash Equivalents and Marketable Securities |  |
Total cash equivalents and marketable securities, Amortized Cost | 45,455 | 75,598
Total cash equivalents and marketable securities, Gross Unrealized Losses | (105) | (50)
Total cash equivalents and marketable securities, Fair Value | 45,350 | 75,548
Supranational and sovereign government securities |  |
Cash Equivalents and Marketable Securities |  |
Total cash equivalents and marketable securities, Amortized Cost | 3,000 | 6,011
Total cash equivalents and marketable securities, Gross Unrealized Losses |  | (1)
Total cash equivalents and marketable securities, Fair Value | 3,000 | 6,010
Money Market Funds |  |
Cash Equivalents and Marketable Securities |  |
Total cash equivalents and marketable securities, Amortized Cost | 35,422 | 39,854
Total cash equivalents and marketable securities, Fair Value | 35,422 | 39,854
Commercial Paper |  |
Cash Equivalents and Marketable Securities |  |
Total cash equivalents and marketable securities, Amortized Cost | 138,123 | 157,157
Total cash equivalents and marketable securities, Gross Unrealized Gains | 1 |
Total cash equivalents and marketable securities, Gross Unrealized Losses | (40) | (16)
Total cash equivalents and marketable securities, Fair Value | $ 138,084 | $ 157,141

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- Definition This item represents the cost of debt and equity securities, including cash equivalents which are categorized neither as held-to-maturity nor trading, 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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