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Note 6 - Business Segments and Sales of Products (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

		Three Months Ended September 30,								Nine Months Ended September 30,
		2019				2018				2019				2018
Net sales to unaffiliated customers:
Greens Creek		$	59,015			$	65,187			$	194,542			$	205,642
Lucky Friday			4,017				(11	)			11,150				8,253
Casa Berardi			53,453				52,850				139,015				164,501
San Sebastian			15,435				14,129				39,028				40,727
Nevada Operations			29,612				11,494				64,586				11,494
		$	161,532			$	143,649			$	448,321			$	430,617
Income (loss) from operations:
Greens Creek		$	17,556			$	10,705			$	52,130			$	59,373
Lucky Friday			(3,727	)			(5,404	)			(8,779	)			(14,811	)
Casa Berardi			(380	)			(1,146	)			(26,262	)			3,118
San Sebastian			1,077				(2,381	)			(2,358	)			2,275
Nevada Operations			(8,346	)			(13,741	)			(43,812	)			(13,741	)
Other			(11,293	)			(18,409	)			(35,633	)			(50,885	)
		$	(5,113	)		$	(30,376	)		$	(64,714	)		$	(14,671	)

		September 30, 2019				December 31, 2018
Identifiable assets:
Greens Creek		$	648,420			$	637,386
Lucky Friday			438,946				437,499
Casa Berardi			717,631				754,248
San Sebastian			50,549				44,152
Nevada Operations			558,219				581,194
Other			259,413				249,465
		$	2,673,178			$	2,703,944

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

		Three Months Ended September 30,								Nine Months Ended September 30,
		2019				2018				2019				2018
Greens Creek			37	%			45	%			44	%			48	%
Lucky Friday			2	%			—	%			2	%			2	%
Casa Berardi			33	%			37	%			31	%			39	%
San Sebastian			10	%			10	%			9	%			9	%
Nevada Operations			18	%			8	%			14	%			2	%
			100	%			100	%			100	%			100	%

Revenue from External Customers by Products and Services [Table Text Block]

		Three Months Ended September 30,								Nine Months Ended September 30,
		2019				2018				2019				2018
Silver		$	40,588			$	38,009			$	122,392			$	111,656
Gold			103,889				82,628				261,734				233,308
Lead			7,114				7,552				22,809				27,469
Zinc			15,292				20,990				62,995				78,714
Less: Smelter and refining charges			(5,351	)			(5,530	)			(21,609	)			(20,530	)
Sales of products		$	161,532			$	143,649			$	448,321			$	430,617

		Three Months Ended September 30,								Nine Months Ended September 30,
		2019				2018				2019				2018
Doré and metals from doré		$	87,525			$	80,074			$	231,391			$	227,812
Carbon			17,745				2,994				27,376				4,273
Lead concentrate			37,685				36,728				122,727				113,211
Zinc concentrate			12,345				14,965				51,876				63,197
Bulk concentrate			5,184				3,866				15,088				13,791
Total, excluding gains/losses on derivative contracts		$	160,484			$	138,627			$	448,458			$	422,284

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

		Three Months Ended September 30,								Nine Months Ended September 30,
		2019				2018				2019				2018
Canada		$	88,610			$	83,723			$	258,708			$	266,915
Korea			33,683				35,796				109,184				110,036
Japan			17,339				3,301				34,924				20,971
Netherlands			445				—				16,500				—
China			—				—				—				66
United States			20,407				15,807				29,142				24,296
Total, excluding gains/losses on derivative contracts		$	160,484			$	138,627			$	448,458			$	422,284

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

		Three Months Ended September 30,								Nine Months Ended September 30,
		2019				2018				2019				2018
CIBC			36	%			26	%			24	%			34	%
Scotia			18	%			19	%			26	%			13	%
Korea Zinc			9	%			15	%			16	%			22	%
Teck Metals Ltd.			3	%			11	%			7	%			11	%
Cliveden			12	%			—	%			4	%			—	%
Trafigura			—	%			10	%			4	%			3	%

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