Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 5,147	$ 4,322
Accounts receivable:
Oil, natural gas liquid and natural gas sales	6,402	5,043
Joint interest owners and other	1,044	1,305
Related parties		279
Derivative financial instruments	13,182	33,219
Prepaid expenses and other	703	724
Total current assets	26,478	44,892
Oil and gas properties, net, using the successful efforts method of accounting	478,363	488,100
Other property and equipment, net	2,106	2,223
Derivative financial instruments	681	2,864
Other noncurrent assets	1,609	1,580
Restricted certificates of deposit	77	77
Total assets	509,314	539,736
Current liabilities
Accounts payable	9,156	18,027
Accounts payable – related parties	160	45
Oil, natural gas liquid and natural gas sales payable	3,995	3,870
Accrued liabilities	8,311	8,276
Accrued liabilities – related parties	243	125
Derivative financial instruments	968
Total current liabilities	22,833	30,343
Long-term debt	315,197	301,926
Deferred tax liability	3,885	16,013
Other non-current liabilities	1,000	1,000
Asset retirement obligations	7,218	7,488
Derivative financial instruments	182
Total liabilities	350,315	356,770
Commitments and contingencies
Stockholders’ equity
Common stock, $0.20 par value, 500,000,000 shares authorized, 15,044,051 shares issued and outstanding at June 30, 2016 and December 31, 2015	142,638	142,638
Additional paid-in capital	10,461	10,270
Accumulated other comprehensive loss	(776)	(760)
Retained earnings	6,676	30,818
Total stockholders’ equity	158,999	182,966
Total liabilities and stockholders’ equity	$ 509,314	$ 539,736