Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 41,327	$ 100,447
Accounts receivable:
Oil, natural gas, and natural gas liquids revenues	15,828	14,016
Joint interest billings and other	6,370	9,417
Prepaid expenses and other current assets	1,058	1,578
Current derivative assets	3,626	3,569
Total current assets	68,209	129,027
Oil and gas properties, successful efforts method:
Proved properties	365,584	317,006
Unproved properties	85,971	76,791
Total oil and gas properties	451,555	393,797
Accumulated depreciation, depletion, and amortization	(111,530)	(97,920)
Net oil and gas properties	340,025	295,877
Other noncurrent assets:
Goodwill	22,992	22,992
Office and other equipment, less accumulated depreciation of $879 and $474 at September 30, 2015 and December 31, 2014	2,032	2,109
Land	101	101
Noncurrent derivative assets	287
Other noncurrent assets	1,184	1,282
TOTAL ASSETS	434,830	451,388
Current liabilities:
Accounts payable	23,662	28,753
Accrued expenses	16,454	20,529
Revenues and royalties payable	9,947	17,364
Advances	21,600	21,398
Asset retirement obligations	341	408
Total current liabilities	72,004	88,452
Noncurrent liabilities:
Long-term debt	11,191	11,191
Asset retirement obligations	5,822	5,670
Deferred tax liability	29,188	29,258
Other noncurrent liabilities	241	289
Total noncurrent liabilities	46,442	46,408
Total liabilities	$ 118,446	$ 134,860
Commitments and Contingencies (Note 10)
Equity:
Preferred stock, $0.001 par value, 20,000,000 shares authorized; none issued or outstanding
Common stock, $0.001 par value, 100,000,000 shares authorized; 13,835,128 shares issued and outstanding at September 30, 2015 and December 31, 2014	$ 14	$ 14
Additional paid-in capital	358,086	358,086
Accumulated deficit	(41,256)	(41,112)
Treasury stock, 15,414 shares at September 30, 2015 and December 31, 2014	(460)	(460)
Total equity	316,384	316,528
TOTAL LIABILITIES AND EQUITY	$ 434,830	$ 451,388