Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net loss	$ (154,539)	$ (118,761)
Adjustments to reconcile net loss to cash provided by operating activities:
Depreciation, depletion and amortization	7,541	9,413
Amortization of debt issuance costs	921	767
Accretion of Class C discount	52,182	38,938
Class C distribution accrual		50,317
Asset impairments		24,222
Accretion expense	460	567
Distributions from equity investments	15,596	15,266
Equity earnings in affiliate	54,073	(4,479)
Bad debt expense	(1,926)
Gain on sale of assets	(537)
Mark-to-market on Stonepeak Warrant	5,779	787
Net gain on commodity derivative contracts		(3,901)
Net cash settlements received on commodity derivative contracts	101	3,054
Gain on Nuvve Holding Warrants	(664)
Unit-based compensation	2,291	2,602
Amortization of intangible assets	13,457	13,460
Changes in Operating Assets and Liabilities:
Accounts receivable	(12,726)	(6,499)
Accounts receivable - related entities		6,719
Prepaid expenses	(34)	598
Other assets	118	(115)
Accounts payable and accrued liabilities	63,452	(27,363)
Accounts payable and accrued liabilities- related entities	(14,790)	32,351
Other long-term liabilities	289
Net cash provided by operating activities	31,044	37,943
Cash flows from investing activities:
Proceeds from sales of oil and natural gas properties	15,721
Development of oil and natural gas properties		5
Construction of gathering and transportation assets	(133)	(1,832)
Contributions to equity affiliates	(232)	(111)
Net cash provided by (used in) investing activities	15,356	(1,938)
Cash flows from financing activities:
Repayment of debt	(67,300)	(52,000)
Proceeds from issuance of debt	5,500	13,000
Issuance of common units	17,054
Payments for offering costs	(672)
Units tendered by employees for tax withholdings		(41)
Debt issuance costs	(1,025)	(345)
Net cash used in financing activities	(46,443)	(39,386)
Net decrease in cash and cash equivalents	(43)	(3,381)
Cash and cash equivalents, beginning of period	1,718	5,099
Cash and cash equivalents, end of period	1,675	1,718
Supplemental disclosures of cash flow information:
Change in accrued capital expenditures	255	796
Cash paid during the period for income tax	139	242
Cash paid during the period for interest	$ 2,575	$ 5,235