Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues	$ 0	$ 0	$ 0	$ 0
Operating expenses
General and administrative expense	14,616	2,937	29,233	10,840
Development expense, net	1,133	0	3,870	0
Lease expense	299	240	808	678
Depreciation expense	41	43	129	136
Total operating expenses	16,089	3,220	34,040	11,654
Total operating loss	(16,089)	(3,220)	(34,040)	(11,654)
Other income (expense)
Gain (loss) on common stock warrant liabilities	(2,773)	4,442	(7,192)	(2,363)
Other, net	65	0	86	1
Total other expense	(2,708)	4,442	(7,106)	(2,362)
Net loss attributable to NextDecade Corporation	(18,797)	1,222	(41,146)	(14,016)
Preferred stock dividends	(6,248)	(5,264)	(17,777)	(13,015)
Deemed dividends on Series A Convertible Preferred Stock	0	(16)	0	(47)
Net loss attributable to common stockholders	$ (25,045)	$ (4,058)	$ (58,923)	$ (27,078)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.19)	$ (0.03)	$ (0.47)	$ (0.23)
Weighted average shares outstanding - basic and diluted (in shares)	129,418	119,374	125,716	118,677