Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 170,836	$ 67,247
Accounts receivable, net of allowance for doubtful accounts	32,217	18,438
Inventories, net	29,305	19,119
Prepaid expenses	3,870	3,378
Other current assets	1,562	914
Total Current Assets	237,790	109,096
Property, plant and equipment, net	471,964	281,073
Deposits on equipment	3,189	3,710
Operating lease right of use assets	6,874	7,866
Equity method investment	26,736	27,894
Other assets	11,774	4,749
Total Assets	758,327	434,388
CURRENT LIABILITIES:
Accounts payable	12,828	16,452
Accrued expenses	14,556	15,371
Current operating lease liabilities	1,359	1,298
Total Current Liabilities	28,743	33,121
Long term operating lease liabilities	6,066	7,098
Total Liabilities	34,809	40,219
STOCKHOLDERS' EQUITY:
Common stock — voting, $0.001 par value, 200,000 shares authorized, 43,404 issued and 43,390 outstanding on September 30, 2021, and 40,732 issued and 40,718 outstanding on December 31, 2020	43	41
Additional paid-in capital	949,995	600,388
Accumulated deficit	(226,357)	(205,924)
Accumulated other comprehensive income (loss)	93	(80)
Treasury stock, at cost — 14 shares on September 30, 2021 and on December 31, 2020	(256)	(256)
Total Stockholders' Equity	723,518	394,169
Total Liabilities and Stockholders' Equity	$ 758,327	$ 434,388