UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 12,484	$ 12,757
Short-term investments (Note 3)	373	384
Other current assets	663	811
Total current assets	13,520	13,952
Non-current assets:
Mineral properties (Note 4)	2,146	2,146
Plant and equipment, net (Note 5)	224	233
Right-of-use assets	8	12
Total non-current assets	2,378	2,391
Total assets	15,898	16,343
Current liabilities:
Accounts payable	722	566
Accrued liabilities and other	820	839
Deferred option gain (Note 4)		383
Total current liabilities	1,542	1,788
Non-current liabilities:
Provision for environmental liability (Note 7)	240	240
Other liabilities	25	21
Total non-current liabilities	265	261
Total liabilities	1,807	2,049
Commitments and contingencies (Note 8)
Shareholders' equity:
Common shares, no par value - unlimited shares authorized; shares outstanding: 2022 - 117,981,100 and 2021 - 117,189,232 (Note 6)	474,298	474,181
Accumulated deficit	(460,207)	(459,887)
Total shareholders' equity	14,091	14,294
Total liabilities and shareholders' equity	$ 15,898	$ 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.