Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash and cash equivalents	$ 9,448	$ 5,959
Accounts receivable	88,770	119,332
Assets held for sale	2,474
Other current assets	26,757	8,639
Total current assets	127,449	133,930
Oil and natural gas properties, successful efforts method:
Unproved properties	532,660	482,475
Proved oil and gas properties, net	1,191,807	807,583
Other property and equipment, net	12,550	6,300
Total property and equipment, net	1,737,017	1,296,358
OTHER NONCURRENT ASSETS
Other assets	8,875	3,481
Operating lease right-of-use assets	38,187
Assets held for sale	8,748
TOTAL ASSETS	1,920,276	1,433,769
CURRENT LIABILITIES
Accounts payable	113,771	116,735
Accrued capital expenditures	43,221	12,979
Accrued liabilities	59,096	56,909
Accrued interest payable	22,351	21,661
Liabilities associated with assets held for sale	4,843
Operating lease liability	17,166
Total current liabilities	260,448	208,284
NONCURRENT LIABILITIES
Debt, net of unamortized discount and debt issuance costs	499,155	497,778
Revolving credit facility	127,500	32,500
Asset retirement obligations	26,679	7,110
Other liabilities	564	611
Operating lease liability	22,321
Liabilities associated with assets held for sale	6,772
Total liabilities	943,439	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, 35,687,207 and 20,169,063 shares issued and outstanding, respectively	382	3,043
Additional paid in capital	2,349,154	2,065,119
Treasury stock, shares at cost; 2,480,655 and 1,747,624 shares, respectively	(8,794)	(3,357)
Accumulated deficit	(1,363,905)	(1,377,319)
Total stockholders' equity	976,837	687,486
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,920,276	$ 1,433,769