UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 6,106	$ 1,408
Short-term investments (Note 3)	4,049	3,260
Other investments, at fair value (Note 3)	295	3,676
Other current assets	190	482
Total current assets	10,640	8,826
Non-current assets:
Mineral properties (Note 4)	2,146	2,146
Plant and equipment, net (Note 5)	5,589	5,623
Right-of-use assets	16	89
Total non-current assets	7,751	7,858
Total assets	18,391	16,684
Current liabilities:
Accounts payable	69	190
Accrued liabilities and other	637	472
Deferred option gain (Note 4)	68	168
Provision for environmental liability (Note 7)		240
Total current liabilities	774	1,070
Non-current liabilities:
Deferred option gain (Note 4)		2,960
Provision for environmental liability (Note 7)	240
Lease liability	3	8
Total non-current liabilities	243	2,968
Total liabilities	1,017	4,038
Commitments and contingencies - (Note 8)
Shareholders' equity:
Common shares, no par value - unlimited shares authorized; shares outstanding: 2020 - 102,684,704 and 2019 - 100,698,124 (Note 6)	459,822	457,716
Accumulated deficit	(442,448)	(445,070)
Total shareholders' equity	17,374	12,646
Total liabilities and shareholders' equity	$ 18,391	$ 16,684

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 in twelve months or in the next operating cycle if longer.