UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 10,696	$ 12,757
Short-term investments (Note 3)	374	384
Other current assets	421	811
Total current assets	11,491	13,952
Non-current assets:
Mineral properties (Note 4)	2,146	2,146
Plant and equipment, net (Note 5)	214	233
Right-of-use assets	4	12
Total non-current assets	2,364	2,391
Total assets	13,855	16,343
Current liabilities:
Accounts payable	209	566
Accrued liabilities and other	817	839
Deferred option gain (Note 4)		383
Total current liabilities	1,026	1,788
Non-current liabilities:
Provision for environmental liability (Note 7)		240
Other liabilities	27	21
Total non-current liabilities	27	261
Total liabilities	1,053	2,049
Commitments and contingencies (Note 7)
Shareholders' equity:
Common shares, no par value - unlimited shares authorized; shares outstanding: 2022 - 118,125,701 and 2021 - 117,189,232 (Note 6)	474,433	474,181
Accumulated deficit	(461,631)	(459,887)
Total shareholders' equity	12,802	14,294
Total liabilities and shareholders' equity	$ 13,855	$ 16,343

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable after twelve months or beyond the next operating cycle if longer.