Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 72,788	$ 67,247
Accounts receivable, net of allowance for doubtful accounts	34,780	18,438
Inventories, net	35,574	19,119
Prepaid expenses	5,834	3,378
Other current assets	1,349	914
Total Current Assets	150,325	109,096
Property, plant and equipment, net	583,922	281,073
Deposits on equipment	4,100	3,710
Operating lease right of use assets	6,537	7,866
Equity method investment	25,856	27,894
Other assets	13,670	4,749
Total Assets	784,410	434,388
CURRENT LIABILITIES:
Accounts payable	42,612	16,452
Accrued expenses	14,950	15,371
Current operating lease liabilities	1,384	1,298
Total Current Liabilities	58,946	33,121
Long term operating lease liabilities	5,710	7,098
Total Liabilities	64,656	40,219
STOCKHOLDERS' EQUITY:
Common stock — voting, $0.001 par value, 200,000 shares authorized, 43,449 issued and 43,435 outstanding on December 31, 2021, and 40,732 issued and 40,718 outstanding on December 31, 2020	43	41
Additional paid-in capital	955,710	600,388
Accumulated deficit	(235,623)	(205,924)
Accumulated other comprehensive (loss)	(120)	(80)
Treasury stock, at cost — 14 shares on December 31, 2021 and on December 31, 2020	(256)	(256)
Total Stockholders' Equity	719,754	394,169
Total Liabilities and Stockholders' Equity	$ 784,410	$ 434,388