Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash and cash equivalents	$ 7,592	$ 5,959
Accounts receivable	120,802	119,332
Assets held for sale	2,294
Other current assets	6,347	8,639
Total current assets	137,035	133,930
Oil and natural gas properties, successful efforts method:
Unproved properties	557,583	482,475
Proved oil and gas properties, net	1,101,772	807,583
Other property and equipment, net	13,146	6,300
Total property and equipment, net	1,672,501	1,296,358
OTHER NONCURRENT ASSETS
Other assets	8,182	3,481
Operating lease right-of-use asset	44,222
Assets held for sale	8,514
TOTAL ASSETS	1,870,454	1,433,769
CURRENT LIABILITIES
Accounts payable	141,410	116,735
Accrued capital expenditures	25,116	12,979
Accrued liabilities	61,960	56,909
Accrued interest payable	10,876	21,661
Liabilities associated with assets held for sale	8,212
Operating lease liability	19,787
Total current liabilities	267,361	208,284
NONCURRENT LIABILITIES
Debt, net of unamortized discount and debt issuance costs	498,469	497,778
Revolving credit facility	97,500	32,500
Asset retirement obligations	24,148	7,110
Other liabilities	1,021	611
Operating lease liability	25,592
Liabilities associated with assets held for sale	6,639
Total liabilities	920,730	746,283
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Preferred stock, 50,000,000 authorized, no shares issued and outstanding
Common stock, $0.01 par value, 1,000,000,000 authorized, 35,682,480 and 20,169,063 shares issued and outstanding, respectively	382	3,043
Additional paid in capital	2,349,527	2,065,119
Treasury stock, shares at cost; 2,478,798 and 1,747,624 shares, respectively	(8,768)	(3,357)
Accumulated deficit	(1,391,417)	(1,377,319)
Total stockholders' equity	949,724	687,486
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,870,454	$ 1,433,769