UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 2,264	$ 1,408
Short-term investments (Note 3)	961	3,260
Other investments, at fair value (Note 3)	2,247	3,676
Other current assets	336	482
Total current assets	5,808	8,826
Non-current assets:
Mineral properties (Note 4)	2,146	2,146
Plant and equipment, net (Note 5)	5,611	5,623
Right-of-use assets	63	89
Total non-current assets	7,820	7,858
Total assets	13,628	16,684
Current liabilities:
Accounts payable	128	190
Accrued liabilities and other	758	640
Provision for environmental liability		240
Total current liabilities	886	1,070
Non-current liabilities:
Deferred option gain (Note 4)	2,960	2,960
Provision for environmental liability (Note 7)	240
Lease liability	6	8
Total non-current liabilities	3,206	2,968
Total liabilities	4,092	4,038
Commitments and contingencies – (Note 8)
Shareholders’ equity:
Common shares, no par value - unlimited shares authorized; shares outstanding: 2020 - 100,698,124 and 2019 - 100,268,161 (Note 6)	458,106	457,716
Accumulated deficit	(448,570)	(445,070)
Total shareholders’ equity	9,536	12,646
Total liabilities and shareholders’ equity	$ 13,628	$ 16,684