UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net loss	$ (4,928)	$ (3,436)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization	30	34
Stock-based compensation	528	668
Gain on disposal of mineral property interests, net		(2,883)
Reduction of provision for environmental liability		(240)
Change in working capital account items:
Other current assets	254	599
Accounts payable, accrued liabilities and other	26	(492)
Net cash used in operating activities	(4,090)	(5,750)
Cash flows from investing activities:
Maturities of short-term investments, net		384
Additions to plant and equipment	(43)	(5)
Proceeds from option/sale agreements, net		2,500
Net cash provided by/(used in) investing activities	(43)	2,879
Cash flows from financing activities:
Proceeds from equity financing, net	1,013	51
Payment of taxes from withheld shares	(142)	(357)
Net cash provided by/(used in) financing activities	871	(306)
Net decrease in cash and cash equivalents	(3,262)	(3,177)
Cash and cash equivalents, beginning of period	8,110	12,757
Cash and cash equivalents, end of period	$ 4,848	$ 9,580