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Leases
 12 Months Ended
Dec. 31, 2025
Leases [Abstract]  
Leases Leases
Lease Commitments
In May 2025, the Company amended the operating lease for its corporate headquarters in Skokie IL., the terms of which terminated certain floors of the leased space and was treated as a lease modification as of the effective date. The partial lease termination of the corporate headquarters leased space resulted in a reduction in the Company’s future minimum fixed lease obligations as of the lease modification date. As a result of the partial lease termination, the Company remeasured its operating lease liabilities and recorded a decrease of $13,085 to reflect the reduced lease payments. The Company also recorded a decrease to right-of-use assets of $13,025 based on the proportionate decrease in the right-of-use asset, which resulted in a gain of $60 recognized in other income (expense), net within the Company’s consolidated statements of operations and comprehensive loss for the year ended December 31, 2025. The lease liability was remeasured using a revised incremental borrowing rate (“IBR”) of 8.0% as of the amendment date in determining the present value of lease payments. The Company estimated the IBR based upon comparing interest rates available in the market for similar borrowings and the credit quality of the Company.
Under the terms of the lease agreement for the Company’s headquarters, the Company was required to deliver the security deposit in the form of a letter of credit to the landlord no later than June 30, 2025. Until such delivery, the obligation represents a commitment under the lease agreement. The letter of credit will not be drawn upon unless the Company fails to perform under the lease terms.
The Company leases certain office space and laboratory facilities. The Company’s lease agreements typically do not contain any significant guarantees of asset values at the end of a lease, renewal options or restrictive covenants. Pursuant to ASC 842, Leases, all leases are classified as operating leases.
Total operating lease costs and variable lease costs for the years ended December 31, 2025 and 2024 were $3,053 and $3,641 and $3,789 and $3,703, respectively. Cash paid for amounts included in the measurement of operating lease liabilities for the years ended December 31, 2025 and 2024 was $3,163 and $1,058, respectively.
As of December 31, 2025, lease payments for operating leases for the Company’s office facility and laboratories was as follows (in thousands):
Year ending December 31,
2026$1,111 
20272,324 
20282,231 
20292,265 
20302,328 
Thereafter15,415 
Total future lease payments
$25,674 
Less: imputed interest9,110 
Total lease liabilities$16,564 
The following is a summary of weighted average remaining lease term and discount rate for all of the Company’s operating leases:
Years Ended December 31,
20252024
Weighted average remaining lease term (years)1112
Weighted average discount rate8.00 %7.50 %
Lessor accounting
In May 2020, the Company executed an agreement to lease certain land to a subsidiary of LanzaJet for a period of 10 years with an option to renew this lease for five additional periods of one year with minimum annual rent due. This agreement is accounted for as an operating lease. Through August 2024, the lease was amended three times to modify the scope of the renting areas, increase the annual rent and increase the term from 10 years to 12 years with an option to renew this lease for thirteen additional periods of one year. The Company recognizes lease revenue on a straight-line basis over the life of the lease agreement. For the year ended December 31, 2025, we recognized $155 of revenue included in revenue from related party transactions in the consolidated statements of operations. The future minimum lease payments owed to the Company from the lease agreement at December 31, 2025, was as follows (in thousands):
Year ending December 31,
2026$155 
2027155 
2028155 
2029155 
2030155 
Thereafter777 
Total
$1,552 
Leases Leases
Lease Commitments
In May 2025, the Company amended the operating lease for its corporate headquarters in Skokie IL., the terms of which terminated certain floors of the leased space and was treated as a lease modification as of the effective date. The partial lease termination of the corporate headquarters leased space resulted in a reduction in the Company’s future minimum fixed lease obligations as of the lease modification date. As a result of the partial lease termination, the Company remeasured its operating lease liabilities and recorded a decrease of $13,085 to reflect the reduced lease payments. The Company also recorded a decrease to right-of-use assets of $13,025 based on the proportionate decrease in the right-of-use asset, which resulted in a gain of $60 recognized in other income (expense), net within the Company’s consolidated statements of operations and comprehensive loss for the year ended December 31, 2025. The lease liability was remeasured using a revised incremental borrowing rate (“IBR”) of 8.0% as of the amendment date in determining the present value of lease payments. The Company estimated the IBR based upon comparing interest rates available in the market for similar borrowings and the credit quality of the Company.
Under the terms of the lease agreement for the Company’s headquarters, the Company was required to deliver the security deposit in the form of a letter of credit to the landlord no later than June 30, 2025. Until such delivery, the obligation represents a commitment under the lease agreement. The letter of credit will not be drawn upon unless the Company fails to perform under the lease terms.
The Company leases certain office space and laboratory facilities. The Company’s lease agreements typically do not contain any significant guarantees of asset values at the end of a lease, renewal options or restrictive covenants. Pursuant to ASC 842, Leases, all leases are classified as operating leases.
Total operating lease costs and variable lease costs for the years ended December 31, 2025 and 2024 were $3,053 and $3,641 and $3,789 and $3,703, respectively. Cash paid for amounts included in the measurement of operating lease liabilities for the years ended December 31, 2025 and 2024 was $3,163 and $1,058, respectively.
As of December 31, 2025, lease payments for operating leases for the Company’s office facility and laboratories was as follows (in thousands):
Year ending December 31,
2026$1,111 
20272,324 
20282,231 
20292,265 
20302,328 
Thereafter15,415 
Total future lease payments
$25,674 
Less: imputed interest9,110 
Total lease liabilities$16,564 
The following is a summary of weighted average remaining lease term and discount rate for all of the Company’s operating leases:
Years Ended December 31,
20252024
Weighted average remaining lease term (years)1112
Weighted average discount rate8.00 %7.50 %
Lessor accounting
In May 2020, the Company executed an agreement to lease certain land to a subsidiary of LanzaJet for a period of 10 years with an option to renew this lease for five additional periods of one year with minimum annual rent due. This agreement is accounted for as an operating lease. Through August 2024, the lease was amended three times to modify the scope of the renting areas, increase the annual rent and increase the term from 10 years to 12 years with an option to renew this lease for thirteen additional periods of one year. The Company recognizes lease revenue on a straight-line basis over the life of the lease agreement. For the year ended December 31, 2025, we recognized $155 of revenue included in revenue from related party transactions in the consolidated statements of operations. The future minimum lease payments owed to the Company from the lease agreement at December 31, 2025, was as follows (in thousands):
Year ending December 31,
2026$155 
2027155 
2028155 
2029155 
2030155 
Thereafter777 
Total
$1,552