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Cash Equivalents and Marketable Securities | 3 Months Ended
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Mar. 31, 2022
Cash Equivalents and Marketable Securities |
Cash Equivalents and Marketable Securities | Note 5. Cash Equivalents and Marketable Securities ​ Cash equivalents and marketable securities consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2022
​ | ​ | Amortized | ​ | Gross Unrealized | ​ |
​ |  | Cost |  | Gains |  | Losses |  | Fair Value
Money market funds | ​ | $ | 35,422 | ​ | $ | — | ​ | $ | — | ​ | $ | 35,422
Commercial paper | ​ |  | 138,123 | ​ | ​ | 1 | ​ | ​ | (40) | ​ |  | 138,084
Corporate debt securities | ​ | ​ | 45,455 | ​ | ​ | — | ​ | ​ | (105) | ​ | ​ | 45,350
U.S. Treasury and agency securities | ​ | ​ | 77,915 | ​ | ​ | 1 | ​ | ​ | (268) | ​ | ​ | 77,648
Supranational and sovereign government securities | ​ |  | 3,000 | ​ | ​ | — | ​ | ​ | — | ​ |  | 3,000
Total cash equivalents and marketable securities | ​ | $ | 299,915 | ​ | $ | 2 |  | $ | (413) | ​ | $ | 299,504
Classified as: | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Cash equivalents | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | $ | 92,692
Marketable securities - current | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  |  | 206,812
Total cash equivalents and marketable securities | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | $ | 299,504
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021
​ | ​ | Amortized | ​ | Gross Unrealized | ​ |
​ |  | Cost |  | Gains |  | Losses |  | Fair Value
Money market funds | ​ | $ | 39,854 | ​ | $ | — |  | $ | — | ​ | $ | 39,854
Commercial paper | ​ |  | 157,157 | ​ |  | — |  |  | (16) | ​ |  | 157,141
Corporate debt securities | ​ |  | 75,598 | ​ |  | — |  |  | (50) | ​ |  | 75,548
U.S. Treasury and agency securities | ​ | ​ | 40,093 | ​ | ​ | — | ​ | ​ | (76) | ​ | ​ | 40,017
Supranational and sovereign government securities | ​ |  | 6,011 | ​ |  | — |  |  | (1) | ​ |  | 6,010
Total cash equivalents and marketable securities | ​ | $ | 318,713 | ​ | $ | — |  | $ | (143) | ​ | $ | 318,570
Classified as: | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Cash equivalents | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | $ | 115,335
Marketable securities - current | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  |  | 203,235
Total cash equivalents and marketable securities | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | $ | 318,570
​ Marketable securities – current of $206.8 million and $203.2 million held at March 31, 2022 and December 31, 2021, respectively, had contractual maturities of less than one year. The Company does not intend to sell its securities that are in an unrealized loss position, and it is not more likely than not that the Company will be required to sell its securities before recovery of their amortized cost basis, which may be at maturity. There were no realized gains or realized losses on marketable securities for the periods presented. Factors considered in determining whether a loss is temporary include the length of time and extent to which the fair value has been less than the amortized cost basis and whether the Company intends to sell the security or whether it is more likely than not that the Company would be required to sell the security before recovery of the amortized cost basis.

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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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