CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 118,969	$ 50,315
Equity securities	3,438	1,520
Prepaid and other current assets	366	754
Total Current Assets	122,773	52,589
Property, plant and equipment, at cost:
Property, plant and equipment	10,577	9,080
Less accumulated depreciation and depletion	(97)	(95)
Net property, plant and equipment	10,480	8,985
Operating lease right-of-use assets	258	353
Restricted cash		10
Other long-term assets	245
Total Assets	133,756	61,937
Current Liabilities:
Accounts payable	3,002	1,734
Accrued liabilities	2,792	2,369
Operating lease liability - current	151	149
Total Current Liabilities	5,945	4,252
Operating lease liability, net of current	117	214
Other long-term liabilities	1,352
Total Liabilities	7,414	4,466
Commitments and Contingencies (see note 10)
Stockholders' Equity:
Common stock, 100,000,000 shares authorized, $.001 par value; Issued shares - 34,636,224 and 19,172,020 respectively Outstanding shares - 34,636,063 and 19,171,859 respectively	34	19
Paid-in capital	466,017	383,723
Accumulated deficit	(339,451)	(326,013)
Less: Treasury stock (161 shares), at cost	(258)	(258)
Total Stockholders' Equity	126,342	57,471
Total Liabilities and Stockholders' Equity	$ 133,756	$ 61,937