Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 1,203	$ 6,571
Restricted cash		600
Accounts receivable	1,663	2,461
Accounts receivable - related entities	7,351	1,515
Prepaid expenses	2,159	744
Fair value of derivative instruments	8,650	21,010
Total current assets	21,026	32,901
Oil and natural gas properties and related equipment
Oil and natural gas properties, equipment and facilities (successful efforts method)	731,977	732,088
Gathering and transportation assets	147,695	147,479
Material and supplies	1,056	1,056
Less accumulated depreciation, depletion, amortization, accretion and impairments	(662,099)	(653,569)
Oil and natural gas properties and equipment, net	218,629	227,054
Other assets
Intangible assets, net	192,824	199,741
Fair value of derivative instruments	6,054	10,008
Other non-current assets	1,524	1,596
Total assets	440,057	471,300
Current liabilities
Accounts payable and accrued liabilities	1,780	7,288
Accounts payable and accrued liabilities - related entities	3,669	1,035
Royalties payable	499	689
Total current liabilities	5,948	9,012
Other liabilities
Asset retirement obligation	19,515	20,364
Embedded derivatives	179,885	193,077
Long-term debt, net of debt issuance costs	107,091	104,909
Total other liabilities	306,491	318,350
Total liabilities	312,439	327,362
Mezzanine equity
Class B preferred units, 19,444,445 units issued and outstanding as of June 30, 2016 and December 31, 2015, respectively	186,264	172,111
Partners' capital
Total members' equity/partners' capital (deficit)	(58,646)	(28,173)
Total liabilities and members' equity/partners' capital	440,057	471,300
Class A Preferred [Member]
Partners' capital
Class A preferred units, zero units issued and outstanding as of June 30, 2016 and 11,409,131 units issued and outstanding as of December 31, 2015		17,112
Total members' equity/partners' capital (deficit)		17,112
Common Units [Member]
Partners' capital
Common units, 4,279,517 units issued and outstanding as of June 30, 2016 and 3,240,812 units issued and outstanding as of December 31, 2015	(58,646)	(45,285)
Total members' equity/partners' capital (deficit)	$ (58,646)	$ (45,285)