CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 115,993	$ 115,293
Prepaid and other current assets	733	320
Total Current Assets	116,726	115,613
Property, plant and equipment, at cost:
Property, plant and equipment	31,799	14,593
Less accumulated depreciation	(136)	(114)
Net property, plant and equipment	31,663	14,479
Operating lease right-of-use assets	192	226
Other long-term assets		2,665
Total Assets	148,581	132,983
Current Liabilities:
Accounts payable	6,201	3,043
Accrued liabilities	1,823	2,129
Operating lease liability - current	152	152
Total Current Liabilities	8,176	5,324
Operating lease liability, net of current	48	83
Other long-term liabilities	1,378	1,378
Total Liabilities	9,602	6,785
Commitments and Contingencies (see note 7)
Stockholders' Equity:
Common stock, 100,000,000 shares authorized, $.001 par value; Issued shares - 42,817,584 and 35,279,724 respectively Outstanding shares - 42,817,423 and 35,279,563 respectively	43	35
Paid-in capital	484,160	468,578
Accumulated deficit	(344,966)	(342,157)
Less: Treasury stock (161 shares), at cost	(258)	(258)
Total Stockholders' Equity	138,979	126,198
Total Liabilities and Stockholders' Equity	$ 148,581	$ 132,983