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Fair Value Measurements and Financial Instruments | 6 Months Ended
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Jun. 30, 2026
Fair Value Disclosures [Abstract] |
Fair Value Measurements and Financial Instruments | 10. Fair Value Measurements and Financial Instruments The fair value of cash and cash equivalents, restricted cash, short-term investments, trade receivables, accounts payable and other current liabilities approximated their carrying values as of June 30, 2026 and December 31, 2025 primarily due to the short-term maturity of these instruments. On October 21, 2021, the Company completed a private offering of $450 million aggregate principal amount of 5.125% Senior Notes due 2029 (the “Senior Notes”). Based on market trades of the Senior Notes close to June 30, 2026 and December 31, 2025 (Level 1 fair value measurement), the fair value of the Senior Notes was estimated at approximately $381.2 million and $387.4 million, respectively, compared to a gross carrying value of $412 million a nd $450 million at June 30, 2026 and December 31, 2025, respectively. The fair value of the other long-term debt approximated their respective carrying values as of June 30, 2026 and December 31, 2025 due to the frequency with which interest rates are reset based on changes in prevailing interest rates. The fair value of fuel futures contracts was determined using NYMEX quoted values. Until their expiration on December 22, 2025, the public warrants to purchase the Company’s common stock (the “Public Warrants”) were measured at fair value at the end of each reporting period. The fair value methodology for the Public Warrants had been categorized as Level 1. Approximately $0.7 million and $6.5 million were recorded as a component of interest and other financial income on the condensed consolidated statements of operations for the change in the fair value of the Public Warrants for the three and six months ended June 30, 2025, respectively. Until their expiration on December 22, 2025, the private warrants to purchase the Company’s common stock (the “Private Warrants”) were measured at fair value at the end of each reporting period. The fair value methodology for the Private Warrants had been categorized as Level 2 because certain inputs for the valuation methodology were unobservable and significant to the fair value adjustment. The Private Warrants have been recorded at fair value based on a Black-Scholes option pricing model. Approximately $0.1 million and $1.0 million were recorded as a component of interest and other financial income on the condensed consolidated statements of operations for the change in the fair value of the Private Warrants for the three and six months ended June 30, 2025, respectively. The founders of Haymaker Acquisition Corp. II are entitled to up to 200 thousand shares of common stock to be issued subject to the number of incremental shares of common stock issued to the holders of the Series A redeemable preferred stock not being higher than certain thresholds (the “Additional Deferred Shares”). The Additional Deferred Shares are measured at fair value at the end of each reporting period and amounted to $1.3 million and $0.7 million as of June 30, 2026 and December 31, 2025, respectively. The fair value methodology for the Additional Deferred Shares is categorized as Level 3 because inputs to the valuation methodology are unobservable and significant to the fair value adjustment. The Additional Deferred Shares have been recorded at fair value based on a Monte Carlo pricing model with the following material assumptions based on observable and unobservable inputs:
|  | June 30, 2026 |
Expected term (in years) |  |  | 0.9 |
Volatility |  |  | 59.0 | %
Risk-free interest rate |  |  | 4.0 | %
Stock price |  | $ | 8.02 |
For the change in the fair value of the Additional Deferred Shares, $(0.6) million, $(0.04) million, $(0.6) million, $0.3 million were recorded as components of interest and other financial income (expense) on the condensed consolidated statements of operations for the three and six months ended June 30, 2026 and 2025, respectively.

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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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