Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operations
Revenues	$ 0	$ 0
Operating Expenses
General and administrative expenses	12,019	16,001
Land option and lease expenses	428	250
Depreciation expense	41	29
Total operating expenses	12,488	16,280
Total operating loss	(12,488)	(16,280)
Other income (expense)
Loss on Common Stock Warrant liabilities	(197)
Interest income, net	466	122
Other	176	(42)
Total other income	445	80
Net loss attributable to NextDecade Corporation	(12,043)	(16,200)
Preferred stock dividends	(4,972)
Deemed dividends on Series A Convertible Preferred Stock	(551)
Net loss attributable to common stockholders	$ (17,566)	$ (16,200)
Net loss per common share - basic and diluted	$ (0.16)	$ (0.15)
Weighted average shares outstanding - basic and diluted	106,940	106,388