Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues
Gathering and transportation lease revenues	$ 16,257	$ 12,318
Total revenues	17,490	18,536
Operating expenses:
Lease operating expenses	1,715	1,971
Transportation operating expenses	2,676	2,847
Production taxes	183	322
General and administrative expenses	4,749	5,165
Unit-based compensation expense	635	1,438
Depreciation, depletion and amortization	6,429	6,628
Asset impairments	0	0
Accretion expense	133	126
Total operating expenses	16,520	18,497
Other (income) expense
Interest expense, net	2,786	2,599
Earnings from equity investments	(1,442)	(4,272)
Other (income) expense	(46)	270
Total other (income) expenses	1,298	(1,403)
Total expenses	17,818	17,094
Income (loss) before income taxes	(328)	1,442
Income tax expense	46
Net income (loss)	(374)	1,442
Less:
Preferred unit distributions	(8,838)	(8,750)
Preferred unit amortization	(697)	(531)
Net loss attributable to common unitholders	$ (9,909)	$ (7,839)
Net loss per unit
Common units - Basic and Diluted (in dollars per share)	$ (0.61)	$ (0.53)
Weighted Average Units Outstanding, Common Units - Basic and Diluted (in units)	16,173,858	14,738,528
Common units
Other (income) expense
Net income (loss)	$ (374)	$ 1,442
Natural gas sales
Revenues
Revenues	110	473
Oil sales
Revenues
Revenues	(739)	3,462
Natural gas liquid product
Revenues
Revenues	179	595
Gathering and transportation
Revenues
Revenues	$ 1,683	$ 1,688