Consolidated balance sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 22,595	$ 37,446
Accounts receivable, net	49,647	66,087
Inventories, net	3,730	4,059
Prepaid expenses	3,471	2,814
Derivative instruments	947	24,025
Total current assets	80,390	134,431
Property and equipment, net	9,217
Property and equipment, net		43,096
Right of use assets from operating leases	2,444
Oil and natural gas properties, using the full cost method:
Proved	1,276,036	915,333
Unevaluated (excluded from the amortization base)	371,229	466,616
Accumulated depreciation, depletion, amortization and impairment	(754,379)	(221,431)
Total oil and natural gas properties	892,886	1,160,518
Held for sale assets	2,860	0
Derivative instruments	0	2,199
Other assets	635	425
Total assets	988,432	1,340,669
Current liabilities:
Accounts payable and accrued liabilities	64,558	73,779
Accrued payroll and benefits payable	10,963	10,976
Accrued interest payable	12,227	13,359
Revenue distribution payable	22,370	26,225
Long-term debt and capital leases, classified as current	594	12,371
Derivative instruments	11,957	0
Total current liabilities	122,669	136,710
Long-term debt and capital leases, less current maturities	421,392	295,100
Derivative instruments	5,075	1,542
Noncurrent operating lease obligations	917
Deferred compensation	165	540
Asset retirement obligation	21,073	22,090
Commitments and contingencies (See Note 18)
Stockholders’ equity:
Preferred stock, 5,000,000 shares authorized, none issued and outstanding as of December 31, 2019 and 2018	0	0
Common stock, $0.01 par value, 192,130,071 shares authorized; 48,413,185 issued and 47,942,230 outstanding at December 31, 2019 and 46,651,616 issued and 46,390,513 outstanding at December 31, 2018	485	467
Additional paid in capital	977,174	974,616
Treasury stock, at cost, 470,955 and 261,103 shares at December 31, 2019 and 2018	(6,110)	(4,936)
Accumulated deficit	(554,408)	(85,460)
Total stockholders’ equity	417,141	884,687
Total liabilities and stockholders’ equity	$ 988,432	$ 1,340,669