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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Current assets    
Cash and cash equivalents $ 148,400 $ 121,231
Restricted cash - collateral 0 50,000
Restricted cash - other 2,840 2,840
Accounts receivable, net 57,168 74,097
Derivative contracts 17,828 0
Prepaid expenses 3,925 5,375
Other current assets 9,914 3,633
Total current assets 240,075 257,176
Oil and natural gas properties, using full cost method of accounting    
Proved 934,248 840,201
Unproved 111,202 74,937
Less: accumulated depreciation, depletion and impairment (404,143) (353,030)
Net oil and natural gas properties capitalized costs 641,307 562,108
Other property, plant and equipment, net 242,291 255,824
Derivative contracts 7,478 0
Other assets 1,527 6,284
Total assets 1,132,678 1,081,392
Current liabilities    
Accounts payable and accrued expenses 113,019 116,517
Derivative contracts 0 27,538
Asset retirement obligations 65,893 66,154
Other current liabilities 8,270 3,497
Total current liabilities 187,182 213,706
Long-term debt 37,679 305,308
Derivative contracts 0 2,176
Asset retirement obligations 41,953 40,327
Other long-term obligations 1,703 6,958
Total liabilities 268,517 568,475
Commitments and contingencies (Note 7)
Stockholders’ Equity    
Common stock, $0.001 par value; 250,000 shares authorized; 35,797 issued and outstanding at June 30, 2017 and 21,042 issued and 19,635 outstanding at December 31, 2016 34 20
Warrants 88,381 88,381
Additional paid-in capital 1,035,421 758,498
Accumulated deficit (259,675) (333,982)
Total stockholders’ equity 864,161 512,917
Total liabilities and stockholders’ equity $ 1,132,678 $ 1,081,392