Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 1,902	$ 36,217
Restricted cash	8,083	0
Trade accounts receivable, net	60,351	99,739
Inventories	8,716	20,262
Assets held for sale	4,383	55,149
Prepaid expenses and other current assets	12,010	9,021
Total current assets	95,445	220,388
Property and equipment, net	210,563	297,113
Operating lease right-of-use assets	9,614	14,540
Intangible assets, net	6,178	2,603
Other assets, net	27,273	15,830
Total assets	349,073	550,474
Current liabilities:
Accounts payable	64,944	60,002
Accrued expenses	55,264	39,230
Current portion of insurance reserves	22,587	15,814
Current portion of finance lease liabilities	7,520	18,738
Current portion of operating lease liabilities	1,936	4,906
Other current liabilities	8,371	9,494
Total current liabilities	160,622	148,184
Long-term debt, net	317,763	308,365
Insurance reserves	19,636	16,582
Asset retirement obligations	9,697	9,044
Operating lease liabilities	8,488	9,634
Other long-term liabilities	13,499	17,542
Total liabilities	529,705	509,351
Series A Participating Preferred Stock; $0.01 par value; 5,000,000 authorized and 118,805 and zero shares outstanding at December 31, 2020 and 2019, respectively	22,000	0
Stockholders' equity (deficit):
Common stock, $0.01 par value: 198,805,000 and 80,000,000 shares authorized, 27,912,059 and 27,912,059 shares issued, and 24,899,932 and 24,904,485 shares outstanding at December 31, 2020 and 2019, respectively	279	279
Additional paid-in capital	493,767	472,594
Retained deficit	(691,344)	(423,169)
Treasury stock, at cost 3,012,127 and 3,007,574 shares at December 31, 2020 and 2019, respectively	(5,334)	(8,581)
Total stockholders' equity (deficit)	(202,632)	41,123
Total liabilities and stockholder's equity (deficit)	$ 349,073	$ 550,474