Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 3,753	$ 21,137
Accounts receivable, net of allowance of $448 and $25, respectively	18,146	20,546
Derivative instruments	427	2,551
Prepaid expenses and other current assets	4,438	1,851
Total current assets	26,764	46,085
Property and equipment:
Oil and natural gas properties, full cost method of accounting, net	228,855	430,379
Other property and equipment, net	421	524
Total property and equipment, net	229,276	430,903
Right-of-use assets	1,722	0
Other assets	837	3,785
Total assets	258,599	480,773
Current liabilities:
Current portion of long-term debt	115,000	0
Accounts payable	24,834	47,112
Accrued liabilities and other	13,972	14,794
Revenue payable	11,442	14,546
Derivative instruments	5,044	515
Total current liabilities	170,292	76,967
Asset retirement obligations	3,423	2,433
Long-term debt	0	157,804
Long-term derivative instruments and other non-current liabilities	3,762	4,699
Long-term deferred revenue and other long-term liabilities	73,749	52,513
Total liabilities	251,226	294,416
Commitments and Contingencies - Note 21
Stockholders’ equity (deficit):
Common stock, $0.0001 par value per share, 150,000,000 shares authorized 91,584,460 and 71,182,016 issued and outstanding as of December 31, 2019 and December 31, 2018, respectively	9	7
Additional paid-in capital	342,382	321,753
Treasury stock, 253,598 shares at cost	(997)	(997)
Accumulated deficit	(579,552)	(307,431)
Total stockholders’ equity (deficit)	(238,158)	13,332
Total liabilities, mezzanine equity and stockholders’ equity (deficit)	258,599	480,773
Series C-1 Preferred Stock
Current liabilities:
Mezzanine equity:	80,446	106,774
Series C-2 Preferred Stock
Current liabilities:
Mezzanine equity:	18,857	25,522
Series D Preferred Stock
Current liabilities:
Mezzanine equity:	29,082	40,729
Series E Preferred Stock
Current liabilities:
Mezzanine equity:	66,285	0
Series F Preferred Stock
Current liabilities:
Mezzanine equity:	$ 50,861	$ 0