Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 5,936	$ 6,571
Restricted cash		600
Accounts receivable	1,911	2,461
Accounts receivable - related entities	1,931	1,515
Prepaid expenses	1,890	744
Fair value of derivative instruments	17,332	21,010
Total current assets	29,000	32,901
Oil and natural gas properties and related equipment
Oil and natural gas properties, equipment and facilities (successful efforts method)	732,277	732,088
Gathering and transportation assets	147,566	147,479
Material and supplies	1,056	1,056
Less accumulated depreciation, depletion, amortization, accretion and impairments	(658,578)	(653,569)
Oil and natural gas properties and equipment, net	222,321	227,054
Other assets
Intangible assets, net	196,283	199,741
Fair value of derivative instruments	10,582	10,008
Other non-current assets	1,564	1,596
Total assets	459,750	471,300
Current liabilities
Accounts payable and accrued liabilities	3,740	7,288
Accounts payable and accrued liabilities - related entities	3,041	1,035
Royalties payable	450	689
Total current liabilities	7,231	9,012
Other liabilities
Asset retirement obligation	20,636	20,364
Embedded derivatives	186,783	193,077
Long-term debt, net of debt issuance costs	107,032	104,909
Total other liabilities	314,451	318,350
Total liabilities	$ 321,682	$ 327,362
Commitments and contingencies (See Note 9)
Mezzanine equity
Class B preferred units, 19,444,445 and zero units issued and outstanding as of March 31, 2016 and December 31, 2015, respectively	$ 179,763	$ 172,111
Partners' capital
Total partners' capital (deficit)	(41,695)	(28,173)
Total liabilities and partners' capital	459,750	471,300
Class A Preferred [Member]
Partners' capital
Class A preferred units, zero and 11,694,364 units issued and outstanding as of March 31, 2016 and December 31, 2015, respectively		17,112
Total partners' capital (deficit)		17,112
Common Units [Member]
Partners' capital
Common units, 4,157,826 and 3,240,812 units issued and outstanding as of March 31, 2016 and December 31, 2015, respectively	(41,695)	(45,285)
Total partners' capital (deficit)	$ (41,695)	$ (45,285)