Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS
Cash and cash equivalents	$ 6,412	$ 17,224
Accounts receivable	125,285	77,609
Assets held for sale		206
Other current assets	7,266	12,023
Total current assets	138,963	107,062
Oil and natural gas properties, successful efforts method:
Unproved properties	485,123	459,549
Proved oil and gas properties, net	802,026	647,881
Other property and equipment, net	6,618	6,942
Total property and equipment, net	1,293,767	1,114,372
OTHER NONCURRENT ASSETS
Other assets	1,499	2,093
TOTAL ASSETS	1,434,229	1,223,527
CURRENT LIABILITIES
Accounts payable	94,586	76,174
Accrued capital expenditures	11,619	10,658
Accrued liabilities	62,077	41,662
Accrued interest payable	10,866	21,100
Total current liabilities	179,148	149,594
NONCURRENT LIABILITIES
Debt, net of unamortized discount and debt issuance costs	497,087	495,021
Credit facility	99,000
Asset retirement obligations	6,903	6,029
Other liabilities	2,816	529
Total liabilities	784,954	651,173
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Preferred stock, 50,000,000 authorized, no shares issued and outstanding	0	0
Common stock, $0.01 par value, 1,000,000,000 authorized, 302,535,938 and 262,740,355 shares issued and outstanding, respectively	3,043	2,637
Additional paid in capital	2,063,396	1,967,958
Treasury stock, shares at cost; 1,747,624 and 992,315 shares, respectively	(3,357)	(2,096)
Accumulated deficit	(1,413,807)	(1,396,145)
Total stockholders' equity	649,275	572,354
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,434,229	$ 1,223,527