Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues
Operating expenses
General and administrative expense	3,579	6,214	10,405	25,533
Invitation to bid contract costs		4,418	10,163	4,418
Land option and lease expense	754	297	1,750	797
Depreciation expense	80	50	164	127
Total operating expenses	4,413	10,979	22,482	30,875
Total operating loss	(4,413)	(10,979)	(22,482)	(30,875)
Other income (expense)
Gain (loss) on common stock warrant liabilities	873	83	(965)	83
Interest income, net	319	222	1,193	475
Other	(7)	(6)	264	(45)
Total other (expense) income	1,185	299	492	513
Net loss attributable to NextDecade Corporation	(3,228)	(10,680)	(21,990)	(30,362)
Preferred stock dividends	(2,849)		(7,821)
Deemed dividends on Series A Convertible Preferred Stock	(286)	(271)	(1,324)	(271)
Net loss attributable to common stockholders	$ (6,363)	$ (10,951)	$ (31,135)	$ (30,633)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.06)	$ (0.10)	$ (0.29)	$ (0.29)
Weighted average shares outstanding - basic and diluted (in shares)	107,181	106,639	107,062	106,476