Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 29,730	$ 72,788
Accounts receivable, net of allowance for doubtful accounts	61,458	34,780
Inventories, net	45,311	35,574
Prepaid expenses	4,494	5,834
Other current assets	1,972	1,349
Total Current Assets	142,965	150,325
Property, plant and equipment, net	663,844	583,922
Deposits on equipment	1,167	4,100
Operating lease right of use assets	6,227	6,537
Equity method investment	27,840	25,856
Other assets	11,417	13,670
Total Assets	853,460	784,410
CURRENT LIABILITIES:
Accounts payable	77,151	42,612
Accrued expenses	13,139	14,950
Current operating lease liabilities	1,384	1,384
Current portion of long term debt	4,770	0
Total Current Liabilities	96,444	58,946
Long term debt	43,541	0
Long term operating lease liabilities	5,421	5,710
Total Liabilities	145,406	64,656
STOCKHOLDERS' EQUITY:
Common stock — voting, $0.001 par value, 200,000 shares authorized, 43,485 issued and 43,471 outstanding on March 31, 2022, and 43,449 issued and 43,435 outstanding on December 31, 2021	43	43
Additional paid-in capital	961,914	955,710
Accumulated deficit	(253,165)	(235,623)
Accumulated other comprehensive loss	(482)	(120)
Treasury stock, at cost — 14 shares on March 31, 2022 and on December 31, 2021	(256)	(256)
Total Stockholders' Equity	708,054	719,754
Total Liabilities and Stockholders' Equity	$ 853,460	$ 784,410