Note 11 - Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

March 31, 2020

Ounces/pounds under contract (in 000's)

Average price per ounce/pound

Silver

Gold

Zinc

Lead

Silver

Gold

Zinc

Lead

(ounces)

(ounces)

(pounds)

(pounds)

(ounces)

(ounces)

(pounds)

(pounds)

Contracts on provisional sales

2020 settlements

45

—

21,330

7,441

$

17.82

N/A

$

0.91

$

0.78

Contracts on forecasted sales

2020 settlements

—

—

—

5,842

N/A

N/A

N/A

$

0.98

December 31, 2019	Ounces/pounds under contract (in 000's)								Average price per ounce/pound
	Silver		Gold		Zinc		Lead		Silver		Gold		Zinc		Lead
	(ounces)		(ounces)		(pounds)		(pounds)		(ounces)		(ounces)		(pounds)		(pounds)
Contracts on provisional sales
2020 settlements		2,556		10		21,550		5,159	$	17.20	$	1,481	$	1.04	$	0.88
Contracts on forecasted sales
2020 settlements		—		—		441		11,740		N/A		N/A	$	1.13	$	0.98

March 31, 2020	Ounces under contract (in 000's)				Average price per ounce
	Silver		Gold		Silver		Gold
	(ounces)		(ounces)		(ounces)		(ounces)
Contracts on forecasted sales
2020 settlements		2,840		95	$	16.00	$	1,482

December 31, 2019	Ounces under contract (in 000's)				Average price per ounce
	Silver		Gold		Silver		Gold
	(ounces)		(ounces)		(ounces)		(ounces)
Contracts on forecasted sales
2020 settlements		5,700		130	$	15.73	$	1,435