Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$ 4,013	$ 12,056
Accounts receivable	63,483	77,402
Assets held for sale	1,544	1,047
Other current assets	8,984	35,509
Total current assets	78,024	126,014
Oil and natural gas properties, successful efforts method:
Unproved properties	478,644	508,576
Proved oil and gas properties, net	1,216,836	1,251,105
Other property and equipment, net	10,311	11,226
Total property and equipment, net	1,705,791	1,770,907
OTHER NONCURRENT ASSETS
Other assets	5,353	7,616
Operating lease right-of-use assets	30,830	36,975
Assets held for sale	3,403	9,665
TOTAL ASSETS	1,823,401	1,951,177
CURRENT LIABILITIES
Accounts payable	120,785	119,907
Accrued capital expenditures	11,933	43,500
Accrued liabilities	61,963	53,866
Accrued interest payable	9,921	21,308
Liabilities associated with assets held for sale	3,711	2,815
Operating lease liability	12,773	12,666
Total current liabilities	221,086	254,062
NONCURRENT LIABILITIES
Debt, net of unamortized discount and debt issuance costs	502,622	500,541
Revolving credit facility	170,000	130,000
Asset retirement obligations	30,336	29,877
Other liabilities	31,421	8,029
Operating lease liability	18,805	24,569
Liabilities associated with assets held for sale	7,150	7,013
Total liabilities	981,420	954,091
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, 36,034,837 and 35,770,934 shares issued and outstanding, respectively	386	383
Additional paid in capital	2,355,890	2,352,309
Treasury stock, shares at cost; 2,600,672 and 2,508,485 shares, respectively	(10,511)	(10,049)
Accumulated deficit	(1,503,784)	(1,345,557)
Total stockholders’ equity	841,981	997,086
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,823,401	$ 1,951,177