Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues	$ 0	$ 0
Operating expenses
General and administrative expense	1,369	6,814
Land option and lease expense	204	411
Depreciation expense	48	16
Total operating expenses	1,621	7,241
Total operating loss	(1,621)	(7,241)
Other income (expense)
(Loss) gain on common stock warrant liabilities	(2,038)	8,339
Loss on redemption of investment securities	0	(412)
Interest income, net	1	233
Other	0	(17)
Total other (expense) income	(2,037)	8,143
Net ( loss) income attributable to NextDecade Corporation	(3,658)	902
Preferred stock dividends	(3,875)	(3,443)
Deemed dividends on Series A Convertible Preferred Stock	(16)	(76)
Net loss attributable to common stockholders	$ (7,549)	$ (2,617)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.06)	$ (0.02)
Weighted average shares outstanding - basic and diluted (in shares)	118,262	117,353