Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues	$ 0	$ 0	$ 0	$ 0
Operating expenses
General and administrative expense	11,293	6,533	14,616	7,903
Development expense	1,193	0	2,738	0
Lease expense	290	234	509	438
Depreciation expense	42	45	89	93
Total operating expenses	12,818	6,812	17,952	8,434
Total operating loss	(12,818)	(6,812)	(17,952)	(8,434)
Other income (expense)
Gain (loss) on common stock warrant liabilities	1,886	(4,768)	(4,418)	(6,806)
Other, net	20	0	21	2
Total other expense	1,906	(4,768)	(4,397)	(6,804)
Net loss attributable to NextDecade Corporation	(10,912)	(11,580)	(22,349)	(15,238)
Preferred stock dividends	(5,774)	(3,876)	(11,529)	(7,751)
Deemed dividends on Series A Convertible Preferred Stock	0	(15)	0	(31)
Net loss attributable to common stockholders	$ (16,686)	$ (15,471)	$ (33,878)	$ (23,020)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.13)	$ (0.13)	$ (0.27)	$ (0.19)
Weighted average shares outstanding - basic and diluted (in shares)	126,314	118,382	123,835	118,322