Note 11 - Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2016

Notes Tables

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

March 31, 2016

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

2016 settlements

1,196

4

15,818

9,700

$

15.29

$

1,225

$

0.80

$

0.77

December 31, 2015

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

2016 settlements

1,368

5

23,755

8,433

$

14.12

$

1,076

$

0.71

$

0.77