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Short-Term Investments (Details) $ in Thousands | Mar. 31, 2025 USD ($) item | Dec. 31, 2024 USD ($) item
--- | --- | ---
Short-Term Investments |  |
Credit Loss related to sale of securities | $ 0 | $ 0
Short-term Investments |  |
Short-Term Investments |  |
Amortized Cost | 240,619 | 268,149
Gross Unrealized Gains | 65 | 167
Gross Unrealized Losses | (5) | (4)
Fair Value | $ 240,679 | $ 268,312
Number of short term investments in unrealized loss position for less than 12 months | item | 5 | 2
Aggregate value of short term investments in unrealized loss position for less than 12 months | $ 22,000 | $ 9,800
Aggregate value of short term investments in other than temporary unrealized loss position for less than 12 months | 0 | 0
Treasury notes |  |
Short-Term Investments |  |
Amortized Cost | 109,318 | 129,064
Gross Unrealized Gains | 49 | 136
Gross Unrealized Losses | (2) | (3)
Fair Value | 109,365 | 129,197
Reverse repurchase agreements |  |
Short-Term Investments |  |
Amortized Cost | 90,000 | 100,000
Fair Value | 90,000 | 100,000
Treasury bills |  |
Short-Term Investments |  |
Amortized Cost | 39,147 | 39,085
Gross Unrealized Gains | 16 | 31
Gross Unrealized Losses | (2) | (1)
Fair Value | 39,161 | $ 39,115
Corporate debt securities |  |
Short-Term Investments |  |
Amortized Cost | 2,154 |
Gross Unrealized Losses | (1) |
Fair Value | $ 2,153 |

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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), other than in a continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References No definition available. + Details
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- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-9 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-9 + Details
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- Definition Amount of cumulative unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity) and investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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