UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 87,398	$ 112,994
Restricted cash	8,827	9,261
Accounts receivable, net of allowance for doubtful accounts of $117 and $141, respectively	52,941	94,534
Inventory	10,021	26,407
Derivative assets	545	0
Income tax receivable	14,495	2,569
Prepayments and other current assets	1,306	1,559
Total current assets	175,533	247,324
Property and equipment, net	65,381	69,046
Operating lease right-of-use assets, net	9,090	9,576
Intangible assets, net	1,465	1,597
Cash deposits and other assets	2,187	3,299
Total assets	253,656	330,842
Current liabilities:
Accounts payable	78,245	147,851
Accounts payable – related party	6	5
Derivative liabilities	526	0
Current portion of finance lease obligations	2,193	2,167
Current portion of operating lease liabilities	2,203	2,252
Other current liabilities	8,808	7,302
Total current liabilities	91,981	159,577
Other long-term liabilities:
Asset retirement obligations	1,585	1,573
Finance lease obligations	3,818	4,376
Operating lease liabilities	6,887	7,323
Deferred taxes and other liabilities	10,059	6,352
Total liabilities	114,330	179,201
Commitments and contingencies (Note 13)
Shareholders’ equity:
Preferred stock - $1.00 par value, 960,000 shares authorized, none outstanding	0	0
Common stock - $0.10 par value, 7,500,000 shares authorized, 4,235,750 and 4,235,533 shares outstanding, respectively	423	423
Contributed capital	12,912	12,778
Retained earnings	125,991	138,440
Total shareholders’ equity	139,326	151,641
Total liabilities and shareholders’ equity	$ 253,656	$ 330,842