Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues	$ 0	$ 0
Operating expenses
General and administrative expense	3,323	1,369
Development expense	1,545	0
Lease expense	219	204
Depreciation expense	47	48
Total operating expenses	5,134	1,621
Total operating loss	(5,134)	(1,621)
Other income (expense)
Loss on common stock warrant liabilities	(6,304)	(2,038)
Other, net	1	1
Total other expense	(6,303)	(2,037)
Net loss attributable to NextDecade Corporation	(11,437)	(3,658)
Preferred stock dividends	(5,754)	(3,875)
Deemed dividends on Series A Convertible Preferred Stock	0	(16)
Net loss attributable to common stockholders	$ (17,191)	$ (7,549)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.14)	$ (0.06)
Weighted average shares outstanding - basic and diluted (in shares)	121,328	118,262