Fair Value Measurement (Tables)
12 Months Ended
Dec. 31, 2021
Fair Value Measurement  
Assets measured at fair value by level within fair value hierarchy

As of

As of

December 31, 

December 31,

Input Hierarchy Level

2021

2020

(in thousands)

Cash and cash equivalents

$

33,712

$

25,405

Level 1

Gold and silver rounds

$

589

$

671

Level 1

Accounts receivable, net

$

8,672

$

4,226

Level 2

Derivative liability - zinc zero cost collar

$

(1,844)

$

-

Level 2

Gains and Losses Related to Changes in Fair Value

For the year ended December 31, 

Statements of Operations Classification

2021

2020

2019

Note

Realized and unrealized derivative gain (loss), net

16

$

1,002

$

(47)

$

1,714

Sales, net

Realized and unrealized gold and silver rounds (loss) gain

18

$

(55)

$

1,173

$

663

Other expense, net

Realized loss on zinc zero cost collar

18

$

(1,156)

$

-

$

-

Realized and unrealized loss on zinc zero cost collar

Unrealized loss on zinc zero cost collar

18

$

(1,844)

$

-

$

-

Realized and unrealized loss on zinc zero cost collar

Realized and Unrealized Gain Losses on Derivatives

The following tables summarize the Company’s realized/unrealized derivatives, net (in thousands):

Gold

Silver

Copper

Lead

Zinc

Total

For the year ended December 31, 2021

Realized (loss) gain

$

(47)

$

(44)

$

73

$

163

$

632

$

777

Unrealized (loss) gain

-

(159)

6

(2)

380

225

Total realized/unrealized derivatives, net

$

(47)

$

(203)

$

79

$

161

$

1,012

$

1,002

Gold

Silver

Copper

Lead

Zinc

Total

For the year ended December 31, 2020

Realized gain (loss)

$

623

$

344

$

35

$

(143)

$

(722)

$

137

Unrealized (loss) gain

(237)

(244)

(15)

59

253

(184)

Total realized/unrealized derivatives, net

$

386

$

100

$

20

$

(84)

$

(469)

$

(47)

Gold

Silver

Copper

Lead

Zinc

Total

For the year ended December 31, 2019

Realized gain (loss)

$

318

$

167

$

17

$

(44)

$

965

$

1,423

Unrealized gain (loss)

117

208

114

(64)

(84)

291

Total realized/unrealized derivatives, net

$

435

$

375

$

131

$

(108)

$

881

$

1,714