Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities:
Net loss attributable to NextDecade Corporation	$ (147,636)	$ (22,349)
Adjustment to reconcile net loss to net cash used in operating activities
Depreciation	75	89
Share-based compensation expense	12,340	515
Loss on common stock warrant liabilities	5,822	4,418
Derivative loss	87,450	0
Amortization of right-of-use assets	523	330
Amortization of other non-current assets	0	354
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(51)	(166)
Accounts payable	309	432
Operating lease liabilities	(593)	(266)
Accrued expenses and other liabilities	557	(832)
Net cash used in operating activities	(41,204)	(17,475)
Investing activities:
Acquisition of property, plant and equipment	(52,953)	(2,602)
Acquisition of other non-current assets	(3,518)	(3,608)
Net cash used in investing activities	(56,471)	(6,210)
Financing activities:
Proceeds from sale of Series C Convertible Preferred Stock	0	10,500
Proceeds from sale of common stock	75,000	30,000
Equity issuance costs	0	(76)
Preferred stock dividends	(32)	(39)
Shares repurchased related to share-based compensation	(70)	(1,752)
Net cash provided by financing activities	74,898	38,633
Net (decrease) increase in cash and cash equivalents	(22,777)	14,948
Cash and cash equivalents – beginning of period	62,789	25,552
Cash and cash equivalents – end of period	40,012	40,500
Non-cash investing activities:
Accounts payable for acquisition of property, plant and equipment	7,066	777
Accrued liabilities for acquisition of property, plant and equipment	0	1,227
Accrued liabilities for acquisition of other non-current assets	457	0
Non-cash financing activities:
Paid-in-kind dividends on Convertible Preferred Stock	13,421	11,490
Accounts payable for debt and equity issuance costs	4,473	0
Accrued liabilities for debt and equity issuance costs	$ 7,627	$ 9