Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities:
Net loss attributable to NextDecade Corporation	$ (27,347)	$ (11,437)
Adjustment to reconcile net loss to net cash used in operating activities
Depreciation	38	47
Share-based compensation expense (forfeiture)	1,559	(2,372)
Loss on common stock warrant liabilities	367	6,304
Amortization of right-of-use assets	258	140
Amortization of other non-current assets	0	354
Changes in operating assets and liabilities:
Prepaid expenses	(421)	(194)
Accounts payable	815	114
Operating lease liabilities	(290)	(156)
Accrued expenses and other liabilities	1,836	(2,994)
Net cash used in operating activities	(23,185)	(10,194)
Investing activities:
Acquisition of property, plant and equipment	(21,528)	(1,314)
Acquisition of other non-current assets	(1,875)	(1,703)
Net cash used in investing activities	(23,403)	(3,017)
Financing activities:
Proceeds from sale of Series C Convertible Preferred Stock	0	10,500
Proceeds from sale of common stock	35,000	0
Preferred stock dividends	(13)	(19)
Shares repurchased related to share-based compensation	(47)	(464)
Net cash provided by financing activities	34,940	10,017
Net decrease in cash and cash equivalents	(11,648)	(3,194)
Cash and cash equivalents – beginning of period	62,789	25,552
Cash and cash equivalents – end of period	51,141	22,358
Non-cash investing activities:
Accounts payable for acquisition of property, plant and equipment	72	339
Accrued liabilities for acquisition of property, plant and equipment	15,826	839
Accrued liabilities for acquisition of other non-current assets	140	0
Non-cash financing activities:
Paid-in-kind dividends on Convertible Preferred Stock	6,686	5,735
Accounts payable for equity issuance costs	$ 0	$ 50