CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents (Note 5)	$ 3,972,000	$ 12,229,000
Short-term investments (Note 5)	20,000	67,000
Inventories, net (Note 7)	1,371,000	1,608,000
Value added tax receivable, net (Note 8)	1,465,000	1,256,000
Prepaid expenses and other assets (Note 6)	1,142,000	1,179,000
Total current assets	7,970,000	16,339,000
Property, plant and equipment, net (Note 9)	6,416,000	6,627,000
Investments (Note 5)	225,000	0
Other long-term assets (Note 10)	333,000	747,000
Total assets	14,944,000	23,713,000
Current liabilities
Accounts payable and other accrued liabilities (Note 11)	3,709,000	3,509,000
Deferred revenue (Note 9)	0	1,469,000
Other current liabilities (Note 13)	640,000	721,000
Total current liabilities	4,349,000	5,699,000
Asset retirement and reclamation liabilities (Note 12)	3,993,000	3,569,000
Other long-term liabilities (Note 13)	122,000	353,000
Total liabilities	8,464,000	9,621,000
Commitments and contingencies (Note 20)
Equity (Note 16)
Common stock, $.01 par value, 350,000,000 shares authorized; 170,258,853 and 162,804,612 shares issued and outstanding respectively	1,703,000	1,628,000
Additional paid-in capital	542,737,000	540,518,000
Accumulated deficit	(537,960,000)	(528,054,000)
Shareholders' equity	6,480,000	14,092,000
Total liabilities and equity	$ 14,944,000	$ 23,713,000