CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 39,293	$ 112,994
Restricted cash	12,772	9,261
Accounts receivable, net of allowance for doubtful accounts of $114 and $141, respectively	99,799	94,534
Inventory	19,336	26,407
Derivative assets	61	0
Income tax receivable	13,288	2,569
Prepayments and other current assets	2,964	1,559
Total current assets	187,513	247,324
Property and equipment, net	94,134	69,046
Operating lease right-of-use assets, net	8,051	9,576
Intangible assets, net	4,106	1,597
Other assets	2,383	3,299
Total assets	296,187	330,842
Current liabilities:
Accounts payable	85,991	147,851
Accounts payable – related party	0	5
Derivative liabilities	52	0
Current portion of finance lease obligations	4,112	2,167
Operating lease liabilities	2,050	2,252
Other current liabilities	22,343	7,302
Total current liabilities	114,548	159,577
Other long-term liabilities:
Asset retirement obligations	2,308	1,573
Total long-term lease obligation	11,507	4,376
Operating lease liabilities	6,000	7,323
Deferred taxes and other liabilities	12,732	6,352
Total liabilities	147,095	179,201
Commitments and contingencies (Note 17)
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, 4,243,716 and 4,235,533 shares outstanding, respectively	423	423
Contributed capital	13,340	12,778
Retained earnings	135,329	138,440
Total shareholders’ equity	149,092	151,641
Total liabilities and shareholders’ equity	$ 296,187	$ 330,842