Note 1 - Background and Basis of Presentation	3 Months Ended
Mar. 31, 2022
Notes to Financial Statements
Business Description and Basis of Presentation [Text Block]	Note 1 — Background and Basis of Presentation NextDecade Corporation engages in development activities related to the liquefaction and sale of liquefied natural gas (“LNG”) and the capture and storage of CO₂ emissions. We have focused our development activities on the Rio Grande LNG terminal facility at the Port of Brownsville in southern Texas (the “Terminal”), a carbon capture and storage project at the Terminal (the “Terminal CCS project”) and other carbon capture and storage projects (“CCS projects”) with third-party industrial source facilities. Basis of Presentation The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with Rule 10-01 of Regulation S-X. Accordingly, they do not include all the information and disclosures required by GAAP for complete financial statements and should be read in conjunction with the consolidated financial statements and accompanying notes included in our Annual Report on Form 10-K for the year ended December 31, 2021. In our opinion, all adjustments, consisting only of normal recurring items, which are considered necessary for a fair presentation of the unaudited consolidated financial statements, have been included. The results of operations for the three months ended March 31, 2022 are not necessarily indicative of the operating results for the full year. Certain reclassifications have been made to conform prior period information to the current presentation. The reclassifications did not have a material effect on our consolidated financial position, results of operations or cash flows.

Note 1 - Background and Basis of Presentation

3 Months Ended

Mar. 31, 2022

Business Description and Basis of Presentation [Text Block]

Note 1 — Background and Basis of Presentation

NextDecade Corporation engages in development activities related to the liquefaction and sale of liquefied natural gas (“LNG”) and the capture and storage of CO₂ emissions. We have focused our development activities on the Rio Grande LNG terminal facility at the Port of Brownsville in southern Texas (the “Terminal”), a carbon capture and storage project at the Terminal (the “Terminal CCS project”) and other carbon capture and storage projects (“CCS projects”) with third-party industrial source facilities.

Basis of Presentation

The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with Rule 10-01 of Regulation S-X. Accordingly, they do not include all the information and disclosures required by GAAP for complete financial statements and should be read in conjunction with the consolidated financial statements and accompanying notes included in our Annual Report on Form 10-K for the year ended December 31, 2021. In our opinion, all adjustments, consisting only of normal recurring items, which are considered necessary for a fair presentation of the unaudited consolidated financial statements, have been included. The results of operations for the three months ended March 31, 2022 are not necessarily indicative of the operating results for the full year.

Certain reclassifications have been made to conform prior period information to the current presentation. The reclassifications did not have a material effect on our consolidated financial position, results of operations or cash flows.