Supplemental Cash Flow Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net loss			$ (5,826,000)	$ (3,577,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	$ 89,000	$ 143,000	241,000	466,000
Accretion of asset retirement obligation			211,000	196,000
Loss (gain) on trading securities			32,000	(24,000)
Write off of deferred financing costs				352,000
Gain on sale of assets			(125,000)	(17,000)
Stock compensation			543,000	1,491,000
Changes in operating assets and liabilities from continuing operations:
Decrease (increase) in prepaid expenses and other assets			(37,000)	343,000
Increase in inventories			(150,000)	(1,552,000)
Increase in value added tax recoverable, net			(480,000)	(1,058,000)
Decrease in other long-term assets			104,000	301,000
Increase (decrease) in reclamation liability			25,000	(33,000)
Increase in accounts payable and accrued liabilities			835,000	2,029,000
Decrease in other current liabilities			(445,000)	(343,000)
Decrease in deferred revenue			(1,125,000)	(404,000)
Decrease in other long-term liabilities			(204,000)	(263,000)
Net cash used in operating activities			$ (6,401,000)	$ (2,093,000)