Inventories (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure Of Inventories [Abstract]

Disclosure of detailed information about inventories [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Current
Stockpile	$	13,906	$	10,396
Work in progress		6,364		14,420
Finished goods		72,923		62,230
Materials and supplies		49,912		51,774
		143,105		138,820
Non-current
Stockpile		16,704		14,626
Materials and supplies		5,302		4,829
		22,006		19,455
	$	165,111	$	158,275