Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues	$ 0	$ 0	$ 0	$ 0
Operating expenses
General and administrative expense	26,795	11,293	53,067	14,616
Development expense, net	418	1,193	882	2,738
Lease expense	325	290	662	509
Depreciation expense	38	42	75	89
Total operating expenses	27,576	12,818	54,686	17,952
Total operating loss	(27,576)	(12,818)	(54,686)	(17,952)
Other income (expense)
(Loss) gain on common stock warrant liabilities	(5,455)	1,886	(5,822)	(4,418)
Derivative loss	(87,450)	0	(87,450)	0
Other, net	192	20	322	21
Total other expense	(92,713)	1,906	(92,950)	(4,397)
Net loss attributable to NextDecade Corporation	(120,289)	(10,912)	(147,636)	(22,349)
Preferred stock dividends	(6,754)	(5,774)	(13,454)	(11,529)
Net loss attributable to common stockholders	$ (127,043)	$ (16,686)	$ (161,090)	$ (33,878)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.84)	$ (0.13)	$ (1.08)	$ (0.27)
Weighted average shares outstanding - basic and diluted (in shares)	150,933	126,314	148,943	123,835