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Marketable Securities | 3 Months Ended
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Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
Marketable Securities | Marketable Securities The following tables summarize the Company's marketable debt securities (in thousands):
| March 31, 2022 |  |  |  |  |  |  |  |  |  |
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities | $ | 128,231 |  |  | $ | — |  |  | $ | (274) |  |  | $ | 127,957 |  |  |  |  |  |  |  |  |  |  |
Government-sponsored enterprises | 7,705 |  |  | — |  |  | (5) |  |  | 7,700 |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities | 1,004 |  |  | — |  |  | (3) |  |  | 1,001 |  |  |  |  |  |  |  |  |  |  |
Total | $ | 136,940 |  |  | $ | — |  |  | $ | (282) |  |  | $ | 136,658 |  |  |  |  |  |  |  |  |  |  |
| December 31, 2021
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
U.S. Treasury securities | $ | 81,184 |  |  | $ | — |  |  | $ | (52) |  |  | $ | 81,132 |
Government-sponsored enterprises | 7,739 |  |  | — |  |  | (5) |  |  | 7,734 |
Corporate debt securities | 31,285 |  |  | — |  |  | (4) |  |  | 31,281 |
Total | $ | 120,208 |  |  | $ | — |  |  | $ | (61) |  |  | $ | 120,147 |
All available-for-sale marketable debt securities held as of March 31, 2022 and December 31, 2021 had contractual maturities of less than one year. All of the Company's available-for-sale marketable debt securities in an unrealized loss position as of March 31, 2022 and December 31, 2021 were in a loss position for less than twelve months. Unrealized losses on available-for-sale debt securities as of March 31, 2022 and December 31, 2021 were not significant and were primarily due to changes in interest rates, including market credit spreads, and not due to increased credit risks associated with specific securities. Accordingly, no allowance for credit losses related to the Company's available-for-sale debt securities was recorded for any periods presented. The Company does not intend to sell these investments and it is not more likely than not that the Company will be required to sell the investments before recovery of their amortized cost bases, which may be at maturity.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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