Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ (51,142)	$ 15,691
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation and depletion	11,873	12,527
Amortization of debt issuance costs	1,266	783
Accretion of Class C discount	13,129
Class C distribution accrual	19,309
Asset impairments	32,119
Accretion expense	526	497
Distributions from equity investments	17,227	24,946
Equity earnings in affiliate	(2,831)	(12,859)
Gain on sale of assets		(3,186)
Mark-to-market on Warrant	(3,244)
Net loss (gain) on commodity derivative contracts	3,772	(1,316)
Net cash settlements received (paid) on commodity derivative contracts	1,101	(1,326)
Unit-based compensation	1,351	1,938
Gain on earnout derivative	(5,856)	(546)
Amortization of intangible assets	13,460	13,460
Changes in Operating Assets and Liabilities:
Accounts receivable	(6)	(377)
Accounts receivable - related entities	(23)	6,389
Prepaid expenses	(262)	1,739
Other assets	83	82
Accounts payable and accrued liabilities	6,378	13,719
Accounts payable and accrued liabilities- related entities	(122)	(5,333)
Royalties payable		(12)
Other long-term liabilities	(123)	126
Net cash provided by operating activities	57,985	66,942
Cash flows from investing activities:
Development of oil and natural gas properties	(131)	(11)
Proceeds from sale of assets		7,692
Construction of gathering and transportation assets	(1,063)	(2,533)
Contributions to equity affiliates	(242)	(2,838)
Net cash provided by (used in) investing activities	(1,436)	2,310
Cash flows from financing activities:
Payments for offering costs		(50)
Payments for Class C Preferred Unit Exchange	(238)
Proceeds from issuance of debt	4,000	2,000
Repayment of debt	(34,000)	(11,000)
Distributions to common unitholders	(5,216)	(23,243)
Class B Preferred Unit cash distributions	(17,675)	(33,338)
Units tendered by SOG employees for tax withholdings	(218)
Debt issuance costs	(1,037)	(1,008)
Net cash used in financing activities	(54,384)	(66,639)
Net increase in cash and cash equivalents	2,165	2,613
Cash and cash equivalents, beginning of period	2,934	321
Cash and cash equivalents, end of period	5,099	2,934
Supplemental disclosures of cash flow information:
Change in accrued capital expenditures	528	525
Cash paid during the period for income taxes	138
Cash paid during the period for interest	$ 9,159	$ 9,763