Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 272,624	$ 158,050
Accounts receivable, net of allowance for doubtful accounts of $12,156 and $12,080 at December 31, 2019 and 2018, respectively	332,047	447,353
Income taxes receivable	740
Prepaid expenses	49,132	45,802
Inventory and other current assets	117,629	121,700
Assets held for sale	216,197
Total current assets	988,369	772,905
Property, plant and equipment, net of accumulated depreciation and depletion	664,949	1,109,126
Operating lease right-of-use assets	80,906
Goodwill	137,695	136,788
Notes receivable	68,092	63,993
Restricted cash	2,764	5,698
Intangible and other long-term assets, net of accumulated amortization	50,455	127,452
Total assets	1,993,230	2,215,962
Current liabilities:
Accounts payable	92,966	139,325
Accrued expenses	182,934	219,180
Income taxes payable		734
Current portion of decommissioning liabilities	3,649	3,538
Liabilities held for sale	44,938
Total current liabilities	324,487	362,777
Long-term debt, net	1,286,629	1,282,921
Decommissioning liabilities	132,632	126,558
Operating lease liabilities	62,354
Deferred income taxes	3,247
Other long-term liabilities	134,308	152,967
Stockholders' equity:
Preferred stock of $0.01 par value, Authorized - 5,000,000 shares; none issued
Common stock of $0.001 par value, Authorized - 25,000,000, Issued - 15,689,463, Outstanding - 14,717,051 at December 31, 2019, Authorized - 25,000,000, Issued and Outstanding - 15,488,542 as of December 31, 2018	16	155
Additional paid in capital	2,752,859	2,735,125
Treasury stock at cost, 972,412 and 0 shares at December 31, 2019 and 2018, respectively	(4,290)
Accumulated other comprehensive loss, net	(71,927)	(73,177)
Retained deficit	(2,627,085)	(2,371,364)
Total stockholders' equity	49,573	290,739
Total liabilities and stockholders' equity	$ 1,993,230	$ 2,215,962