CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 40,813	$ 72,752
Restricted cash	1,200	1,725
Trade accounts and other receivables, net	23,834	35,693
Inventories:
Finished goods	39,747	41,422
Raw materials and supplies	18,680	22,592
Total inventories	58,427	64,014
Prepaid expenses and other current assets	4,910	4,754
Income tax receivable	2,328	2,319
Total current assets	131,512	181,257
Restricted cash	8,853	8,840
Property, plant and equipment:
Land and land improvements	39,584	39,584
Land-use and mineral rights	20,264	19,696
Buildings	75,978	75,815
Machinery and equipment	425,378	432,906
Construction in progress	28,762	29,129
Total property, plant and equipment	589,966	597,130
Less accumulated depreciation and amortization	333,243	323,511
Net property, plant and equipment	256,723	273,619
Goodwill	3,500	3,500
Operating lease right-of-use assets	52,266
Intangible and other assets, net	11,391	7,150
Total assets	464,245	474,366
Current liabilities:
Accounts payable	13,910	12,174
Accrued payroll and benefits	4,048	6,950
Accrued freight	2,377	2,434
Accrued utilities	589	1,012
Other accrued expenses	7,810	14,020
Notes payable, related parties		27,040
Long-term debt, current portion		15,733
Operating lease liabilities	11,531
Other current liabilities	712	1,192
Total current liabilities	40,977	80,555
Deferred income taxes	1,114	1,114
Long-term debt, net	62,048	45,650
Noncurrent operating lease liabilities	49,866
Other long-term liabilities	4,209	10,764
Shareholders' equity:
Preferred stock, par value $0.01 per share, 5,000 shares authorized, none outstanding
Common stock, par value $0.01 per share, 80,000,000 shares authorized; 29,377,538 and 27,710,861 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	294	277
Additional paid-in capital	138,288	132,080
Retained earnings	167,449	203,926
Total shareholders' equity	306,031	336,283
Total liabilities and shareholders' equity	$ 464,245	$ 474,366