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Intangible Assets
 12 Months Ended
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible AssetsOn September 21, 2021, the Company entered into an asset purchase agreement with Butamax Advanced Biofuels LLC and its affiliate, Danisco US Inc. (collectively, "Butamax"), pursuant to which the Company purchased all of Butamax’s rights, title and interests in certain U.S. and foreign patents and patent applications, subject to specified conditions and encumbrances, relating to the production, recovery and use of biobutanol that were owned by Butamax, for $9.2 million, including $0.2 million of legal fees. Management evaluated the patents to determine whether the patents (i) supported current products; (ii) supported planned research and development; or (iii) prevent others from competing with Gevo's products. Based on the Company's estimated purchase price allocation, approximately $4.3 million of the purchase price was allocated to the purchase of patents to support current products and planned product research and $4.9 million for patents purchased for defensive purposes. The patents are included in "Intangible assets" on the Consolidated Balance Sheets.
Identifiable intangible assets were comprised of the following (in thousands):

 December 31, 2022
 Gross Carrying AmountAccumulated AmortizationIdentifiable Intangible Assets, netWeighted-Average Life (Years)
Patents$4,580 $(1,039)$3,541 7.4
Defensive assets4,900 (750)4,150 8.4
Identifiable intangible assets$9,480 $(1,789)$7,691 7.9
     
 December 31, 2021
 Gross Carrying AmountAccumulated AmortizationIdentifiable Intangible Assets, netWeighted-Average Life (Years)
Patents$4,575 $(368)$4,207 7.3
Defensive assets4,895 (164)4,731 8.4
Identifiable intangible assets$9,470 $(532)$8,938 7.9

The Company recorded amortization expense of $1.3 million and $0.3 million for the years ended December 31, 2022 and 2021, respectively.

The following table details the estimated amortization of identifiable intangible assets as of December 31, 2022 (in thousands):

Year Ending December 31,PatentsDefensive AssetsTotal
2023$578 $586 $1,164 
2024580 588 1,168 
2025578 586 1,164 
2026578 586 1,164 
2027578 586 1,164 
2028 and thereafter649 1,218 1,867 
Total$3,541 $4,150 $7,691