Mineral Properties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Mineral properties, beginning	$ 2,525	$ 2,127
Reverse acquisition (Note 26)	7,865
Additions	216	698
Exchange differences		(300)
Impairment	(1,996)	0
Mineral properties, ending		2,525
Mining Assets
Mineral properties, beginning	1,780	1,280
Reverse acquisition (Note 26)	6,830
Additions	216	500
Exchange differences		0
Impairment	(1,996)
Mineral properties, ending	6,830	1,780
Surface Rights Acquired
Mineral properties, beginning	745	847
Reverse acquisition (Note 26)	1,035
Additions	0	198
Exchange differences		(300)
Impairment	0
Mineral properties, ending	$ 1,780	$ 745