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Fair value measurement (Tables) | 9 Months Ended
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Sep. 30, 2025
Fair Value Disclosures [Abstract] |
Schedule of the Company's Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis | The following tables set forth the Company’s financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2025 and December 31, 2024, based on the three-tier fair value hierarchy: (In thousands)
As of September 30, 2025 | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |
Money market accounts | $ | 23,039 |  |  | $ | — |  |  | $ | — |  |  | $ | 23,039 |
Available-for-sale securities: |  |  |  |  |  |  |
U.S. government securities | 16,901 |  |  | — |  |  | — |  |  | 16,901 |
Corporate debt securities | 6,004 |  |  | 35,354 |  |  | — |  |  | 41,358 |
Other debt securities | — |  |  | 10,658 |  |  | — |  |  | 10,658 |
Convertible promissory note | — |  |  | — |  |  | 2,041 |  |  | 2,041 |
Total | $ | 45,944 |  |  | $ | 46,012 |  |  | $ | 2,041 |  |  | $ | 93,997 |
As of December 31, 2024 |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |
Money market accounts | $ | 89,119 |  |  | $ | — |  |  | $ | — |  |  | $ | 89,119 |
Available-for-sale securities: |  |  |  |  |  |  |
U.S. government securities | 1,494 |  |  | — |  |  | — |  |  | 1,494 |
Corporate debt securities | 398 |  |  | 8,602 |  |  | — |  |  | 9,000 |
Other debt securities | — |  |  | 3,332 |  |  | — |  |  | 3,332 |
Total | $ | 91,011 |  |  | $ | 11,934 |  |  | $ | — |  |  | $ | 102,945 |
Schedule of the Changes in Fair Value of the Convertible Promissory Note | The following table presents the changes in fair value of the convertible promissory note that is measured using Level 3 inputs for the nine months ended September 30, 2025.
| Nine Months Ended September 30, |  |
(In thousands) | 2025 |  |
Balance at beginning of period | $ | 2,000 |  |  |
Change in fair value, inclusive of accrued interest income, recognized in net income (loss) from continuing operations | 41 |  |  |
Total | $ | 2,041 |  |  |

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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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/2009/role/commonPracticeRef -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 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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