Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 67,247	$ 9,472
Accounts receivable, net of allowance for doubtful accounts	18,438	18,581
Inventories, net	19,119	12,542
Prepaid expenses	3,378	3,276
Other current assets	914	10,453
Total Current Assets	109,096	54,324
Property, plant and equipment, net	281,073	165,288
Deposits on equipment	3,710	3,601
Operating lease right of use assets	7,866	9,154
Equity method investment	27,894	0
Other assets	4,749	3,759
Total Assets	434,388	236,126
CURRENT LIABILITIES:
Accounts payable	16,452	18,668
Accrued expenses	15,371	22,133
Current operating lease liabilities	1,298	1,185
Total Current Liabilities	33,121	41,986
Long term debt	0	54,466
Long term operating lease liabilities	7,098	8,409
Total Liabilities	40,219	104,861
STOCKHOLDERS' EQUITY:
Common stock — voting, $0.001 par value, 200,000,000 shares authorized, 40,732,409 issued and 40,718,240 outstanding on December 31, 2020, and 36,162,433 issued and 36,148,264 outstanding on December 31, 2019	41	36
Additional paid-in capital	600,388	334,299
Accumulated deficit	(205,924)	(202,735)
Accumulated other comprehensive income (loss)	(80)	(79)
Treasury stock, at cost — 14,169 shares on December 31, 2020 and on December 31, 2019	(256)	(256)
Total Stockholders' Equity	394,169	131,265
Total Liabilities and Stockholders' Equity	$ 434,388	$ 236,126