Note 11 - Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2016

Notes Tables

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

June 30, 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

1,523

4

19,731

8,818

$

17.40

$

1,271

$

0.88

$

0.79

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