Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash	$ 10,006	$ 10,200
Accounts receivable:
Oil, natural gas, and natural gas liquids revenues	8,479	13,998
Joint interest billings and other, net of allowance of $163 at both March 31, 2017 and December 31, 2016	2,346	2,698
Prepaid expenses and other current assets	659	446
Total current assets	21,490	27,342
Oil and gas properties, successful efforts method:
Proved properties	364,758	363,072
Unproved properties	51,887	51,723
Total oil and gas properties	416,645	414,795
Accumulated depreciation, depletion and amortization	(153,152)	(145,393)
Net oil and gas properties	263,493	269,402
Other noncurrent assets:
Goodwill	17,620	17,620
Office and other equipment, net of accumulated depreciation of $2,221 and $1,600 at March 31, 2017 and December 31 2016, respectively	1,337	1,479
Derivative asset	1
Other noncurrent assets	553	669
TOTAL ASSETS	304,494	316,512
Current liabilities:
Accounts payable	6,131	11,927
Revenues and royalties payable	5,608	10,769
Accrued expenses	7,139	5,392
Derivative liability	799	4,595
Advances	4,997	4,542
Current portion of long-term debt	1,634	1,604
Total current liabilities	26,308	38,829
Noncurrent liabilities:
Long-term debt	12,272	12,693
Asset retirement obligation	6,186	6,013
Derivative liability	326	1,575
Deferred tax liability	15,738	15,776
Other noncurrent liabilities	167	169
Total noncurrent liabilities	34,689	36,226
Commitments and Contingencies (Note 12)
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; 22,575,052 issued and 22,559,695 outstanding at March 31, 2017 and 22,289,177 issued and 22,273,820 outstanding at December 31, 2016	23	23
Additional paid-in capital	455,513	454,202
Accumulated deficit	(211,579)	(212,308)
Treasury stock, 15,357 shares at March 31, 2017 and December 31, 2016, respectively	(460)	(460)
Total equity	243,497	241,457
TOTAL LIABILITIES AND EQUITY	$ 304,494	$ 316,512