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Investments (Tables) | 12 Months Ended
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Dec. 31, 2023
Investments, All Other Investments [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis | Assets measured at fair value on a recurring basis were as follows (in thousands):
| December 31, 2023
| Quoted Price in Active Markets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Assets: |  |  |  |  |  |  |
Obligations of U.S. Government and its agencies | $ | — |  |  | $ | 277,358 |  |  | $ | — |  |  | $ | 277,358 |
Certificates of deposit | — |  |  | 986 |  |  | — |  |  | 986 |
Total assets | $ | — |  |  | $ | 278,344 |  |  | $ | — |  |  | $ | 278,344 |
| December 31, 2022
| Quoted Price in Active Markets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Assets: |  |  |  |  |  |  |
Obligations of U.S. Government and its agencies | $ | — |  |  | $ | 129,371 |  |  | $ | — |  |  | $ | 129,371 |
Corporate debt securities | — |  |  | 6,092 |  |  | — |  |  | 6,092 |
Certificates of deposit | — |  |  | 2,157 |  |  | — |  |  | 2,157 |
Total assets | $ | — |  |  | $ | 137,620 |  |  | $ | — |  |  | $ | 137,620 |
Fair Value of the Company's Investments by Type |
| December 31, 2023
| Amortized Cost |  | Accrued Interest |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Obligations of U.S. Government and its agencies | $ | 277,151 |  |  | $ | 121 |  |  | $ | 150 |  |  | $ | (64) |  |  | $ | 277,358 |
Certificates of deposit | 980 |  |  | 14 |  |  | — |  |  | (8) |  |  | 986 |
Total investments | $ | 278,131 |  |  | $ | 135 |  |  | $ | 150 |  |  | $ | (72) |  |  | $ | 278,344 |
| December 31, 2022
| Amortized Cost |  | Accrued Interest |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Obligations of U.S. Government and its agencies | $ | 129,940 |  |  | $ | 427 |  |  | $ | — |  |  | $ | (996) |  |  | $ | 129,371 |
Corporate debt securities | 6,093 |  |  | 37 |  |  | — |  |  | (38) |  |  | 6,092 |
Certificates of deposit | 2,163 |  |  | 23 |  |  | — |  |  | (29) |  |  | 2,157 |
Total investments | $ | 138,196 |  |  | $ | 487 |  |  | $ | — |  |  | $ | (1,063) |  |  | $ | 137,620 |
Schedule of the Maturity of Investments | The following table summarizes the scheduled maturity for the Company’s investments at December 31, 2023 and 2022 (in thousands):
| December 31,
| 2023 |  | 2022
Maturing in one year or less | $ | 278,344 |  |  | $ | 119,543 |
Maturing after one year through two years | — |  |  | 18,077 |
Total investments | $ | 278,344 |  |  | $ | 137,620 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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