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Fair Value Measurements | 6 Months Ended
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Jun. 30, 2026
Fair Value Measurements. |
Fair Value Measurements | 5. Fair Value Measurements ​ Financial assets and liabilities are measured and recorded at fair value. The Company is required to disclose information on all assets and liabilities reported at fair value that enables an assessment of the inputs used in determining the reported fair values. The fair value hierarchy prioritizes valuation inputs based on the observable nature of those inputs. The fair value hierarchy applies only to the valuation inputs used in determining the reported fair value of the investments and is not a measure of the investment credit quality. The hierarchy defines three levels of valuation inputs: ​
| ● | Level 1—Quoted prices in active markets for identical assets or liabilities
​
| ● | Level 2—Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly
​
| ● | Level 3—Unobservable inputs that reflect the Company’s own assumptions about the assumptions market participants would use in pricing the asset or liability
​ There have been no transfers of assets and liabilities between levels of hierarchy. ​ The Company’s Level 2 investments are valued using third-party pricing sources. The pricing services utilize industry standard valuation models, including both income and market-based approaches, for which all significant inputs are observable, either directly or indirectly, to estimate fair value. These inputs include reported trades of and broker/dealer quotes on the same or similar investments, issuer credit spreads, benchmark investments, prepayment/default projections based on historical data and other observable inputs. ​ The following tables present information as of June 30, 2026 and December 31, 2025 about the Company’s assets that are measured at fair value on a recurring basis and indicate the level of the fair value hierarchy the Company utilized to determine such fair values (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2026
​ | ​ | Fair Value Measured Using | ​ | Total
​ | ​ ​ ​ | (Level 1) | ​ ​ ​ | (Level 2) | ​ ​ ​ | (Level 3) | ​ ​ ​ | Balance
Assets |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Cash equivalents | ​ | $ | 18,226 | ​ | $ | — | ​ | $ | — | ​ | $ | 18,226
Marketable securities | ​ |  | — | ​ |  | 196,323 | ​ |  | — | ​ |  | 196,323
​ | ​ | $ | 18,226 | ​ | $ | 196,323 | ​ | $ | — | ​ | $ | 214,549
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2025
​ | ​ | Fair Value Measured Using | ​ | Total
​ | ​ ​ ​ | (Level 1) | ​ ​ ​ | (Level 2) | ​ ​ ​ | (Level 3) | ​ ​ ​ | Balance
Assets |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Cash equivalents | ​ | $ | 4,163 | ​ | $ | — | ​ | $ | — | ​ | $ | 4,163
Marketable securities | ​ | ​ | — | ​ |  | 52,174 | ​ |  | — | ​ |  | 52,174
​ | ​ | $ | 4,163 | ​ | $ | 52,174 | ​ | $ | — | ​ | $ | 56,337
​ As of June 30, 2026 and December 31, 2025, the fair value of available for sale marketable securities by type of security were as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2026
​ | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Gross | ​ ​ ​ | Gross | ​ ​ ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value
U.S. Treasury securities | ​ | $ | 170,821 | ​ | $ | 2 | ​ | $ | (589) | ​ | $ | 170,234
U.S. Government agency securities | ​ | ​ | 26,260 | ​ | ​ | — | ​ | ​ | (171) | ​ | ​ | 26,089
​ | ​ | $ | 197,081 | ​ | $ | 2 | ​ | $ | (760) | ​ | $ | 196,323
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2025
​ | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Gross | ​ ​ ​ | Gross | ​ ​ ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value
U.S. Treasury securities | ​ | $ | 38,622 | ​ | $ | 53 | ​ | $ | — | ​ | $ | 38,675
U.S. Government agency securities | ​ | ​ | 13,489 | ​ | ​ | 10 | ​ | ​ | — | ​ | ​ | 13,499
​ | ​ | $ | 52,111 | ​ | $ | 63 | ​ | $ | — | ​ | $ | 52,174
​ ​ ​ ​ As of June 30, 2026, all of the Company’s marketable securities are considered available for current operations and the remaining maturity by type of security is as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Maturities by Period at Amortized Cost
​ | ​ | ​ | ​ | ​ | Less than | ​ | ​ | ​
​ | ​ ​ ​ | Total | ​ ​ ​ | 1 Year | ​ ​ ​ | 1-2 years
U.S. Treasury securities | ​ | $ | 170,821 | ​ | $ | 98,927 | ​ | $ | 71,894
U.S. Government agency securities | ​ | ​ | 26,260 | ​ | ​ | 7,154 | ​ | ​ | 19,106
​ | ​ | $ | 197,081 | ​ | $ | 106,081 | ​ | $ | 91,000
​

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 940 -SubTopic 820 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478119/940-820-50-1 + Details
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