Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 957	$ 6,571
Restricted cash	0	600
Accounts receivable	1,212	2,461
Accounts receivable - related entities	5,987	1,515
Prepaid expenses	2,041	744
Fair value of derivative instruments	4,568	21,010
Total current assets	14,765	32,901
Oil and natural gas properties and related equipment
Oil and natural gas properties, equipment and facilities (successful efforts method)	758,913	732,088
Gathering and transportation assets	152,209	147,479
Material and supplies	1,056	1,056
Less: accumulated depreciation, depletion, amortization and impairment	(689,358)	(653,569)
Oil and natural gas properties and equipment, net	222,820	227,054
Other assets
Intangible assets, net	185,766	199,741
Fair value of derivative instruments	3,964	10,008
Equity investments	111,614	642
Other non-current assets	776	954
Total assets	539,705	471,300
Current liabilities
Accounts payable and accrued liabilities	951	7,288
Accounts payable and accrued liabilities - related entities	7,046	1,035
Royalties payable	706	689
Fair value of derivative instruments	740
Total current liabilities	9,443	9,012
Other liabilities
Asset retirement obligation	13,579	20,364
Embedded derivatives		193,077
Long-term debt, net of debt issuance costs	151,322	104,909
Fair value of derivative instruments	1,356
Other liabilities	4,270
Total other liabilities	170,527	318,350
Total liabilities	179,970	327,362
Commitments and contingencies (See Note 12)
Mezzanine equity
Class B preferred units, 29,296,441 and 19,444,445 units issued and outstanding as of December 31, 2016 and 2015, respectively	342,991	172,111
Partners' capital (deficit)
Class A preferred units, zero and 11,694,364 units issued and outstanding as of December 31, 2016 and 2015, respectively		17,112
Common units, 13,447,749 and 3,240,813 units issued and outstanding as of December 31, 2016 and 2015, respectively	16,744	(45,285)
Total partners' capital (deficit)	16,744	(28,173)
Total liabilities and partners' capital	$ 539,705	$ 471,300