CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 115,293	$ 50,315
Equity securities		1,520
Prepaid and other current assets	320	754
Total Current Assets	115,613	52,589
Property, plant and equipment, at cost:
Property, plant and equipment	14,593	9,080
Less accumulated depreciation and depletion	(114)	(95)
Net property, plant and equipment	14,479	8,985
Operating lease right-of-use assets	226	353
Restricted cash		10
Other long-term assets	2,665
Total Assets	132,983	61,937
Current Liabilities:
Accounts payable	3,043	1,734
Accrued liabilities	2,129	2,369
Operating lease liability - current	152	149
Total Current Liabilities	5,324	4,252
Operating lease liability, net of current	83	214
Other long-term liabilities	1,378
Total Liabilities	6,785	4,466
Commitments and Contingencies (see note 10)
Stockholders' Equity:
Common stock, 100,000,000 shares authorized, $.001 par value; Issued shares - 35,279,724 and 19,172,020 respectively Outstanding shares - 35,279,563 and 19,171,859 respectively	35	19
Paid-in capital	468,578	383,723
Accumulated deficit	(342,157)	(326,013)
Less: Treasury stock (161 shares), at cost	(258)	(258)
Total Stockholders' Equity	126,198	57,471
Total Liabilities and Stockholders' Equity	$ 132,983	$ 61,937