CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 117,861	$ 50,315
Equity securities	1,713	1,520
Prepaid and other current assets	750	754
Total Current Assets	120,324	52,589
Property, plant and equipment, at cost:
Property, plant and equipment	9,079	9,080
Less accumulated depreciation and depletion	(96)	(95)
Net property, plant and equipment	8,983	8,985
Operating lease right-of-use assets	322	353
Restricted cash		10
Total Assets	129,629	61,937
Current Liabilities:
Accounts payable	2,881	1,734
Accrued liabilities	2,191	2,369
Operating lease liability - current	150	149
Total Current Liabilities	5,222	4,252
Operating lease liability, net of current	182	214
Total Liabilities	5,404	4,466
Commitments and Contingencies
Stockholders’ Equity:
Common stock, 100,000,000 shares authorized, $.001 par value; Issued shares – 32,336,476 and 19,172,020 respectively Outstanding shares - 32,336,315 and 19,171,859 respectively	32	19
Paid-in capital	455,854	383,723
Accumulated deficit	(331,403)	(326,013)
Less: Treasury stock (161 shares), at cost	(258)	(258)
Total Stockholders’ Equity	124,225	57,471
Total Liabilities and Stockholders’ Equity	$ 129,629	$ 61,937