Inventories (Tables)

12 Months Ended

Dec. 31, 2019

Disclosure Of Inventories [Abstract]

Disclosure of detailed information about inventories [Table Text Block]

		Dec. 31, 2019		Dec. 31, 2018
Current
Stockpile	$	10,396	$	5,463
Work in progress		14,420		1,762
Finished goods		62,230		62,546
Materials and supplies		51,774		48,703
		138,820		118,474
Non-current
Stockpile		14,626		14,730
Materials and supplies		4,829		4,746
		19,455		19,476
	$	158,275	$	137,950