CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 378	$ 1,071
Short-term investments (Note 3)	6,012	6,997
Other investments, at fair value (Note 3)	4,838	5,462
Other current assets	470	540
Total current assets	11,698	14,070
Non-current assets:
Mineral properties (Note 4)	2,321	2,421
Plant and equipment, net (Note 5)	5,663	5,635
Right-of-use assets (Note 2)	63
Total non-current assets	8,047	8,056
Total assets	19,745	22,126
Current liabilities:
Accounts payable	289	195
Accrued liabilities and other	478	435
Provision for environmental liability	242	242
Total current liabilities	1,009	872
Lease liability (Note 2)	63
Total non-current liabilities	63
Total liabilities	1,072	872
Commitments and contingencies – (Note 7)
Shareholders' equity:
Common shares, no par value - unlimited shares authorized; shares outstanding: 2019 - 100,537,541 and 2018 - 100,268,161 (Note 6)	457,009	456,938
Accumulated deficit	(438,336)	(435,684)
Total shareholders' equity	18,673	21,254
Total liabilities and shareholders' equity	$ 19,745	$ 22,126

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.