Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 62,820	$ 112,517
Marketable securities (Notes 3 and 15)	12,192	494
Trade and other receivables, net of allowance for credit losses of $223 and $223 as of December 31, 2022 and 2021, respectively	519	3,954
Inventories (Note 5)	38,155	30,772
Prepaid expenses and other current assets	9,529	1,568
Property, plant and equipment and other assets held for sale, net (Note 7)	12,375	0
Total current assets	135,590	149,305
Other long-term receivables	1,537	0
Inventories (Note 5)	2,465	1,368
Operating lease right of use asset	1,376	408
Investments accounted for at fair value (Note 6)	19,329	38,538
Property, plant and equipment, net (Note 7)	12,662	21,983
Mineral properties (Note 7)	83,539	83,539
Restricted cash (Note 8)	17,449	20,305
Total assets	273,947	315,446
Current liabilities
Accounts payable and accrued liabilities (Note 13)	6,929	5,764
Operating lease liability	59	324
Deposits for assets held for sale	6,000	0
Asset retirement obligation and other liabilities held for sale (Note 8)	5,636	27
Total current liabilities	18,624	6,115
Operating lease liability	1,319	145
Asset retirement obligation (Note 8)	9,595	13,660
Total liabilities	29,538	19,920
Equity
Share capital Common shares, without par value, unlimited shares authorized; shares issued and outstanding 157,682,531 and 156,262,199 as of December 31, 2022 and 2021, respectively	698,493	685,903
Accumulated deficit	(456,120)	(396,271)
Accumulated other comprehensive income (loss)	(1,946)	1,943
Total shareholders' equity	240,427	291,575
Non-controlling interests	3,982	3,951
Total equity	244,409	295,526
Total liabilities and equity	273,947	315,446
Commitments and contingencies (Note 14)