CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents (Note 5)		$ 1,777	$ 3,766
Short-term investments			11
Accounts receivable		7	51
Value added tax receivable, net (Note 7)		239	3,135
Prepaid expenses and other assets (Note 6)		504	921
Current assets held for sale (Note 3)			830
Total current assets		2,527	8,714
Property, plant and equipment, net (Note 8)		387	443
Investments		265	265
Right-of-use assets		35	110
Assets held for sale (Note 3)		2,889	5,378
Total assets		6,103	14,910
Current liabilities
Accounts payable and other accrued liabilities (Note 9)		3,272	4,899
Other current liabilities (Note 11)		251	774
Current liabilities held for sale (Note 3)		1,016
Total current liabilities		4,539	5,673
Asset retirement and reclamation liabilities (Note 10)		305	296
Other long-term liabilities (Note 11)			28
Liabilities held for sale (Note 3)		2,941	3,800
Total liabilities		7,785	9,797
Commitments and contingencies (Note 16)
Equity (deficit) (Note 14)
Common stock, $.01 par value, 100,000,000 shares authorized; 15,053,048 and 14,084,680 shares issued and outstanding, respectively	[1]	150	141
Additional paid-in capital		552,469	552,160
Accumulated deficit		(554,301)	(547,188)
Shareholders' equity (deficit)		(1,682)	5,113
Total liabilities and equity (deficit)		$ 6,103	$ 14,910

[1] Reflects the one-for-25 reverse stock split that became effective June 9, 2023. Refer to Note 1, Basis of Preparation of Financial Statements and Nature of Operations.