Reportable Segments (Tables)

6 Months Ended

Jun. 30, 2016

The following tables set forth our segment information for the periods indicated (in thousands):


	Three Months Ended June 30, 2016
	Exploration & Production		Midstream		Total
Operating revenues
Natural gas sales	$	600	$	—	$	600
Oil sales		(2,756)		—		(2,756)
Natural gas liquids sales		244		—		244
Gathering and transportation sales		—		14,258		14,258
Total operating revenues		(1,912)		14,258		12,346

Operating expenses:
Lease operating expenses		3,904		274		4,178
Transportation operating expenses		—		3,014		3,014
Cost of sales		63		—		63
Production taxes		326		—		326
General and administrative		3,550		1,428		4,978
Unit compensation expense		1,091		—		1,091
Depreciation, depletion and amortization		1,036		5,093		6,129
Asset impairments		—		—		—
Accretion expense		253		62		315
Total operating expenses		10,223		9,871		20,094

Operating income (loss)	$	(12,135)	$	4,387	$	(7,748)


	Three Months Ended June 30, 2015
	Exploration & Production		Midstream		Total
Operating revenues
Natural gas sales	$	3,642	$	—	$	3,642
Oil sales		639		—		639
Natural gas liquids sales		500		—		500
Gathering and transportation sales		—		—		—
Total operating revenues		4,781		—		4,781

Operating expenses:
Lease operating expenses		5,358		—		5,358
Cost of sales		125		—		125
Production taxes		583		—		583
General and administrative		3,351		—		3,351
Unit compensation expense		395		—		395
Gain on sale of assets		(54)		—		(54)
Depreciation, depletion and amortization		3,079		—		3,079
Asset impairments		862		—		862
Accretion expense		264		—		264
Total operating expenses		13,963		—		13,963

Operating loss	$	(9,182)	$	—	$	(9,182)


	Six Months Ended June 30, 2016
	Exploration & Production		Midstream		Total
Operating revenues
Natural gas sales	$	4,275	$	—	$	4,275
Oil sales		2,587		—		2,587
Natural gas liquids sales		520		—		520
Gathering and transportation sales		—		28,133		28,133
Total operating revenues		7,382		28,133		35,515

Operating expenses:
Lease operating expenses		8,780		371		9,151
Transportation operating expenses		—		6,068		6,068
Cost of sales		193		—		193
Production taxes		547		—		547
General and administrative		7,984		2,713		10,697
Unit compensation expense		1,529		—		1,529
Depreciation, depletion and amortization		3,149		10,168		13,317
Asset impairments		1,309		—		1,309
Accretion expense		507		123		630
Total operating expenses		23,998		19,443		43,441

Operating income (loss)	$	(16,616)	$	8,690	$	(7,926)


	Six Months Ended June 30, 2015
	Exploration & Production		Midstream		Total
Operating revenues
Natural gas sales	$	10,216	$	—	$	10,216
Oil sales		5,603		—		5,603
Natural gas liquids sales		886		—		886
Gathering and transportation sales		—		—		—
Total operating revenues		16,705		—		16,705

Operating expenses:
Lease operating expenses		10,258		—		10,258
Cost of sales		330		—		330
Production taxes		953		—		953
General and administrative		10,906		—		10,906
Unit compensation expense		2,387		—		2,387
Gain on sale of assets		(113)		—		(113)
Depreciation, depletion and amortization		6,199		—		6,199
Asset impairments		83,727		—		83,727
Accretion expense		517		—		517
Total operating expenses		115,164		—		115,164

Operating loss	$	(98,459)	$	—	$	(98,459)

The following table summarizes the total assets by operating segment as of June 30, 2016 and December 31, 2015 (in thousands):