Pay vs Performance Disclosure
Unit_pure in Thousands

12 Months Ended

Dec. 31, 2022

USD ($)

Dec. 31, 2021

USD ($)

Dec. 31, 2020

USD ($)

Pay vs Performance Disclosure [Table]

Pay vs Performance [Table Text Block]

Pay Versus Performance

As required by Section 953(a) of the Dodd-Frank Wall Street

Reform

and Consumer Protection Act, and Item 402(v) of Regulation

S-K,

we are providing the following information about the relationship between executive compensation actually paid to certain individuals by the Company and certain financial performance of the Company. For further information concerning the Company’s

pay-for-performance

philosophy and how the Company aligns executive compensation with the Company’s performance, refer to the Compensation Discussion and Analysis section of this Proxy Statement.


					Average Summary Compensation Table Total for Non-PEO NEOs (3) ($)		Average Compensation Actually Paid to Non-PEO NEOs (4) ($)		Value of Initial Fixed $100 Investment Based On:
Year	Summary Compensation Table Total for PEO (1) ($)		Compensation Actually Paid to PEO (2) ($)				Average Compensation Actually Paid to Non-PEO NEOs (4) ($)		Total Shareholder Return (5) ($)		Peer Group Total Shareholder Return (6) ($)		Net (Loss) Income (millions) (7) ($)			Adjusted EBITDA Less Capital (thousands) (8) ($)
(a)	(b)		(c)		(d)		(e)		(f)		(g)		(h)			(i)
2022		4,579,866		6,145,949		1,459,386		1,725,457		166.27		117.47		(37.3	)		69,841
2021		3,765,100		3,177,762		915,927		305,615		155.48		135.75		35.1			169,925
2020		5,190,508		7,046,358		1,631,356		2,457,104		191.63		132.26		(9.5	)		130,745

(1)

This column represents the amount of total compensation reported for Mr. Baker, our Principal Executive Officer (“PEO”), for each corresponding year in the “Total” column of the Summary Compensation Table (“total compensation”). Please refer to the Summary Compensation Table in this Proxy Statement on page 61.

(2)

This column represents the amount of “compensation actually paid” to Mr. Baker, as computed in accordance with Item 402(v) of Regulation

S-K.

The amounts do not reflect the actual amount of compensation earned by or paid to Mr. Baker during the applicable year. In accordance with the requirements of Item 402(v) of Regulation

S-K,

the following adjustments were made to Mr. Baker’s total compensation for each year to determine the “compensation actually paid”:


Year	Reported Summary Compensation Table Total for PEO (a) ($)		Reported Summary Compensation Table Value of PEO Equity Awards (b) ($)			Adjusted Value of Equity Awards (c) ($)		Reported Summary Compensation Table Change in Value of Pension Benefits (d) ($)			Pension Benefits Adjustments (e) ($)		Compensation Actually Paid to PEO ($)
2022		4,579,866		(1,205,255	)		2,455,862		—			315,476		6,145,949
2021		3,765,100		(1,370,005	)		1,153,661		(824,973	)		453,979		3,177,762
2020		5,190,508		(937,292	)		3,967,769		(1,628,345	)		453,718		7,046,358

(a)

This column represents the amount of total compensation reported for Mr. Baker for each corresponding year in the “Total” column of the Summary Compensation Table. Please refer to the Summary Compensation Table in this Proxy Statement on page 61.

(b)

This column represents the grant date fair value of equity awards reported in the “Stock Awards” column in the Summary Compensation Table for the applicable year. Please refer to the Summary Compensation Table in this Proxy Statement on page 61.

(c)

This column represents an adjustment to the amounts in the “Stock Awards” column in the Summary Compensation Table for the applicable year (a “Subject Year”). For a Subject Year, the adjusted amount replaces the “Stock Awards” column in the Summary Compensation Table for Mr. Baker for that Subject Year. The adjusted amount is determined by adding (or subtracting, as applicable) the following for that Subject Year: (i) the

year-end

fair value of any equity awards granted in the Subject Year that are outstanding and unvested as of the end of the Subject Year; (ii) the amount of change as of the end of the Subject Year (from the end of the prior calendar year) in the fair value of any awards granted in prior years that are outstanding and unvested as of the end of the Subject Year; (iii) for awards that are granted and vest in the Subject Year, the fair value as of the vesting date; (iv) for awards granted in prior years that vest in the Subject Year, the amount equal to the change as of the vesting date (from the end of the prior calendar year) in the fair value; (v) for awards granted in prior years that are determined to fail to meet the applicable vesting conditions during the Subject Year, a deduction for the amount equal to the fair value at the end of the prior calendar year; and (vi) the dollar value of any dividends or other earnings paid on stock awards in the Subject Year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the Subject Year. The amounts added or subtracted to determine the adjusted amount are as follows:


Year	Year End Fair Value of Equity Awards Granted in the Year ($)		Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards at FYE Granted in Prior Years ($)		Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year ($)		Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year ($)			Fair Value at the End of the Prior Year of Equity Awards that Failed to Meet Vesting Conditions in the Year ($)		Value of Dividends or other Earnings Paid on Stock or Option Awards not Otherwise Reflected in Fair Value or Total Compensation in the Summary Compensation Table for the Year ($)		Adjusted Value of Equity Awards ($)
2022		1,822,337		460,994		—		172,531			—		—		2,455,862
2021		751,905		177,778		—		223,978			—		—		1,153,661
2020		2,194,058		1,851,672		—		(77,961	)		—		—		3,967,769

The fair value or change in fair value, as applicable, of equity awards was determined by reference to (1) for RSU awards, the closing price of our common stock on the applicable measurement date and (2) for PSU awards, a Monte Carlo simulation as of the applicable measurement date.

(d)

The amounts included in this column are the amounts reported in the “Change in Pension and Nonqualified Deferred Compensation” column of the Summary Compensation Table for each applicable year. Please refer to the Summary Compensation Table in this Proxy Statement on page 61.

(e)

The total pension benefit adjustments for each applicable year include the aggregate of two components: (i) the actuarially determined service cost for services rendered by Mr. Baker during the applicable year (the “service cost”); and (ii) the entire cost of benefits granted in a plan amendment (or initiation) during the applicable year that are attributed by the benefit formula to services rendered in periods prior to the plan amendment or initiation (the “prior service cost”), in each case calculated in accordance with U.S. GAAP. The amounts deducted or added in calculating the pension benefit adjustments are as follows:


Year	Service Cost ($)	Prior Service Cost ($)	Total Pension Benefit Adjustments ($)
2022	315,476	—		315,476
2021	453,979	—		453,979
2020	453,718	—		453,718

(3)

This column represents the average of the amounts reported for the Company’s NEOs as a group (excluding Mr. Baker) in the “Total” column of the Summary Compensation Table in each applicable year. Please refer to the Summary Compensation Table in the Company’s Proxy Statement on page 61 for the applicable year. The names of each of the NEOs (excluding Mr. Baker) included for purposes of calculating the average amounts in each applicable year are as follows: (i) for 2022, Messrs. Roberts, Lawlar, Brown, Sienko and Clary; (ii) for 2021, Messrs. Roberts, Lawlar, Brown, Sienko and Hall; and (iii) for 2020, Messrs. Roberts, Lawlar, Brown, Sienko and Hall.

(4)

This column represents the average amount of “compensation actually paid” to the NEOs as a group (excluding Mr. Baker), as computed in accordance with Item 402(v) of Regulation

S-K.

The dollar amounts do not reflect the actual average amount of compensation earned by or paid to the NEOs as a group (excluding Mr. Baker) during the applicable year. In accordance with the requirements of Item 402(v) of Regulation

S-K,

the following adjustments were made to average total compensation for the NEOs as a group (excluding Mr. Baker) for each year to determine the “compensation actually paid”, using the same adjustment methodology described above in Note 2(c):


Year	Average Reported Summary Compensation Table Total for Non-PEO NEOs (a) ($)		Average Reported Summary Compensation Table Value of Non-PEO NEO Equity Awards (b) ($)			Average Non- PEO NEO Adjusted Value of Equity Awards (c) ($)			Average Reported Summary Compensation Table Change in Value of Pension Benefits for Non- PEO NEOs ($)			Pension Benefits Adjustments for Non-PEO NEOs ($)		Average Compensation Actually Paid to Non-PEO NEOs ($)
2022		1,459,386		(319,176	)		561,672			(26,607	)		50,182		1,725,457
2021		915,927		(302,821	)		(248,745	)		(130,636	)		71,890		305,615
2020		1,631,356		(432,168	)		1,381,713			(200,467	)		76,670		2,457,104

(a)

This column represents the average of the amounts reported for the Company’s NEOs as a

group

(excluding Mr. Baker) in the “Total” column of the Summary Compensation Table in each applicable year. Please refer to the Summary Compensation Table in the Company’s Proxy Statement on page 61 for the applicable year.

(b)

This column represents the average of the total amounts reported for the NEOs as a group (excluding Mr. Baker) in the “Stock Awards” column in the Summary Compensation Table in each applicable year. Please refer to the Summary Compensation Table in the Company’s Proxy Statement on page 61 for the applicable year.

(c)

This column represents an adjustment to the average of the amounts reported for the NEOs as a group (excluding Mr. Baker) in the “Stock Awards” column in the Summary Compensation Table in each applicable year determined using the same methodology described above in Note 2(c). For each year, the adjusted amount replaces the “Stock Awards” column in the Summary Compensation Table for each NEO (excluding Mr. Baker) for that year. The amounts added or subtracted to determine the adjusted average amount are as follows:


Year	Average Year End Fair Value of Equity Awards Granted in the Year to Non-PEO NEOs ($)		Average Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards at FYE Granted in Prior Years ($)			Average Fair Value as of Vesting Date of Equity Awards Granted in the Year and Vested in the Year ($)		Average Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year ($)			Average Fair Value at the End of the Prior Year of Equity Awards that Failed to Meet Vesting Conditions in the Year ($)			Average Value of Dividends or other Earnings Paid on Stock or Option Awards not Otherwise Reflected in Fair Value or Total Compensation in the Summary Compensation Table for the Year ($)		Adjusted Average Value of Equity Award ($)
2022		465,379		94,528			—		1,765			—			—		561,672
2021		171,652		(11,051	)		—		56,886			(466,232	)		—		(248,745	)
2020		828,835		584,044			—		(31,166	)		—			—		1,381,713

(d)

The amounts included in this column represent the average of the amounts reported in “Change in Pension and Nonqualified Deferred Compensation” column of the Summary Compensation Table for the NEOs as a group (excluding Mr. Baker) in each applicable year. Please refer to the Summary Compensation Table in the Company’s Proxy Statement on page 61 for the applicable year.

(e)

The total pension benefit adjustments for each applicable year are the aggregate of two components, averaged for the NEOs as a group (excluding Mr. Baker) in each applicable year: (i) the actuarially determined service cost for services rendered by the applicable NEO during the applicable year (the “service cost”); and (ii) the entire cost of benefits granted in a plan amendment (or initiation) during the applicable year that are attributed by the benefit formula to services rendered in periods prior to the plan amendment or initiation (the “prior service cost”), in each case calculated in accordance with U.S. GAAP. The amounts deducted or added in calculating the pension benefit adjustments are as follows:


Year	Service Cost ($)		Prior Service Cost ($)	Total Pension Benefit Adjustments ($)
2022		50,182	—		50,182
2021		71,890	—		71,890
2020		76,670	—		76,670

(5)

This column represents cumulative Company TSR. TSR is calculated by dividing the sum of the cumulative amount of dividends for each measurement period (2020, 2020-2021 and 2020-2022), assuming dividend reinvestment, and the difference between the Company’s share price at the end and the beginning of the measurement period by the Company’s share price at the beginning of the measurement period.

(6)

This column represents cumulative peer group TSR computed in accordance with Note 5. The peer group used for this purpose is the following published industry index: S&P 500 Gold Index.

(7)

This column represents the amount of net income reflected in the Company’s audited financial statements for the applicable year.

(8)

Adjusted EBITDA Less Capital is calculated as net (loss) income before the following items: interest expense, income tax benefit, depreciation, depletion, and amortization expense,

ramp-up

and suspension costs, loss on disposition of properties, plants, equipment and mineral interests, , foreign exchange gain, unrealized (gain) loss on derivative contracts, provisional price loss gain), provision for closed operations and environmental matters, stock-based compensation, unrealized loss on investments, adjustment of inventory to net realizable value, monetization of zinc hedges and other income (“adjusted EBITDA”) less capital expenditures at the Company’s operations.

Company Selected Measure Name

Adjusted EBITDA Less Capital

Named Executive Officers, Footnote [Text Block]

Peer Group Issuers, Footnote [Text Block]

This column represents cumulative peer group TSR computed in accordance with Note 5. The peer group used for this purpose is the following published industry index: S&P 500 Gold Index.

PEO Total Compensation Amount

$ 4,579,866

$ 3,765,100

$ 5,190,508

PEO Actually Paid Compensation Amount

$ 6,145,949

3,177,762

7,046,358

Adjustment To PEO Compensation, Footnote [Text Block]

(2)

This column represents the amount of “compensation actually paid” to Mr. Baker, as computed in accordance with Item 402(v) of Regulation

S-K.

The amounts do not reflect the actual amount of compensation earned by or paid to Mr. Baker during the applicable year. In accordance with the requirements of Item 402(v) of Regulation

S-K,

the following adjustments were made to Mr. Baker’s total compensation for each year to determine the “compensation actually paid”:


Year	Reported Summary Compensation Table Total for PEO (a) ($)		Reported Summary Compensation Table Value of PEO Equity Awards (b) ($)			Adjusted Value of Equity Awards (c) ($)		Reported Summary Compensation Table Change in Value of Pension Benefits (d) ($)			Pension Benefits Adjustments (e) ($)		Compensation Actually Paid to PEO ($)
2022		4,579,866		(1,205,255	)		2,455,862		—			315,476		6,145,949
2021		3,765,100		(1,370,005	)		1,153,661		(824,973	)		453,979		3,177,762
2020		5,190,508		(937,292	)		3,967,769		(1,628,345	)		453,718		7,046,358

(a)

(b)

(c)

year-end


Year	Year End Fair Value of Equity Awards Granted in the Year ($)		Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards at FYE Granted in Prior Years ($)		Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year ($)		Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year ($)			Fair Value at the End of the Prior Year of Equity Awards that Failed to Meet Vesting Conditions in the Year ($)		Value of Dividends or other Earnings Paid on Stock or Option Awards not Otherwise Reflected in Fair Value or Total Compensation in the Summary Compensation Table for the Year ($)		Adjusted Value of Equity Awards ($)
2022		1,822,337		460,994		—		172,531			—		—		2,455,862
2021		751,905		177,778		—		223,978			—		—		1,153,661
2020		2,194,058		1,851,672		—		(77,961	)		—		—		3,967,769

(d)

(e)


Year	Service Cost ($)	Prior Service Cost ($)	Total Pension Benefit Adjustments ($)
2022	315,476	—		315,476
2021	453,979	—		453,979
2020	453,718	—		453,718

Non-PEO NEO Average Total Compensation Amount

$ 1,459,386

915,927

1,631,356

Non-PEO NEO Average Compensation Actually Paid Amount

$ 1,725,457

305,615

2,457,104

Adjustment to Non-PEO NEO Compensation Footnote [Text Block]

(4)

This column represents the average amount of “compensation actually paid” to the NEOs as a group (excluding Mr. Baker), as computed in accordance with Item 402(v) of Regulation

S-K.

S-K,


Year	Average Reported Summary Compensation Table Total for Non-PEO NEOs (a) ($)		Average Reported Summary Compensation Table Value of Non-PEO NEO Equity Awards (b) ($)			Average Non- PEO NEO Adjusted Value of Equity Awards (c) ($)			Average Reported Summary Compensation Table Change in Value of Pension Benefits for Non- PEO NEOs ($)			Pension Benefits Adjustments for Non-PEO NEOs ($)		Average Compensation Actually Paid to Non-PEO NEOs ($)
2022		1,459,386		(319,176	)		561,672			(26,607	)		50,182		1,725,457
2021		915,927		(302,821	)		(248,745	)		(130,636	)		71,890		305,615
2020		1,631,356		(432,168	)		1,381,713			(200,467	)		76,670		2,457,104

(a)

This column represents the average of the amounts reported for the Company’s NEOs as a

group

(b)

(c)


Year	Average Year End Fair Value of Equity Awards Granted in the Year to Non-PEO NEOs ($)		Average Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards at FYE Granted in Prior Years ($)			Average Fair Value as of Vesting Date of Equity Awards Granted in the Year and Vested in the Year ($)		Average Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year ($)			Average Fair Value at the End of the Prior Year of Equity Awards that Failed to Meet Vesting Conditions in the Year ($)			Average Value of Dividends or other Earnings Paid on Stock or Option Awards not Otherwise Reflected in Fair Value or Total Compensation in the Summary Compensation Table for the Year ($)		Adjusted Average Value of Equity Award ($)
2022		465,379		94,528			—		1,765			—			—		561,672
2021		171,652		(11,051	)		—		56,886			(466,232	)		—		(248,745	)
2020		828,835		584,044			—		(31,166	)		—			—		1,381,713

(d)

(e)


Year	Service Cost ($)		Prior Service Cost ($)	Total Pension Benefit Adjustments ($)
2022		50,182	—		50,182
2021		71,890	—		71,890
2020		76,670	—		76,670

Compensation Actually Paid vs. Total Shareholder Return [Text Block]

Compensation Actually Paid and Cumulative Company TSR

The compensation actually paid to our CEO, as computed in accordance with the requirements of Item 402(v) of Regulation

S-K,

was $6,145,949, $3,177,762, and $7,046,358 for 2022, 2021 and 2020, respectively. The

avera

ge amount of compensation actually paid to the other NEOs as a group (excluding Mr. Baker), as computed in accordance with Item 402(v) of Regulation

S-K,

was $1,725,457, $305,615, and $2,457,104 for 2022, 2021 and 2020, respectively. The TSR of the Company, assuming an initial fixed $100 investment and computed in accordance with the requirements of Item 402(v) of Regulation

S-K,

was $166.27, $155.48, and $191.63 for

2020-2022,

2020-2021 and 2020, respectively. Please see Note 5 above for additional information related to the computation of Company TSR.

Compensation Actually Paid vs. Net Income [Text Block]

Compensation Actually Paid and Company Net (Loss) Income

The compensation actually paid to our CEO, as computed in accordance

with

the requirements of Item 402(v) of Regulation

S-K,

was $6,145,949, $3,177,762, and $7,046,358 for 2022, 2021 and 2020, respectively. The average amount of compensation actually paid to the other NEOs as a group (excluding Mr. Baker), as computed in accordance with Item 402(v) of Regulation

S-K,

was $1,725,457, $305,615, and $2,457,104 for 2022, 2021 and 2020, respectively. The Company’s net (loss) income, as computed in accordance with Item 402(v) of Regulation

S-K

and reflected in the Company’s audited financial statements for the applicable year, was ($37.3) million, $35.1 million and ($9.5) million for 2022, 2021 and 2020, respectively.

Compensation Actually Paid vs. Company Selected Measure [Text Block]

Compensation Actually Paid and Company Adjusted EBITDA Less Capital

The compensation actually paid to our CEO, as computed in accordance with the requirements of Item 402(v) of Regulation

S-K,

was $1,725,457, $305,615, and $2,457,104 for 2022, 2021 and 2020, respectively. The Company’s Adjusted EBITDA Less Capital, computed as described in Note 8 above, was $69.8 million, $169.9 million and $130.7 million, for 2022, 2021 and 2020, respectively.

Total Shareholder Return Vs Peer Group [Text Block]

Cumulative TSR of the Company and Cumulative TSR of the Peer Group

The TSR of the Company, assuming an initial fixed $100 investment and computed in accordance with the requirements of Item 402(v) of Regulation

S-K,

was $166.27, $155.48, and $191.63 for 2020-2022, 2020-2021 and 2020, respectively. The TSR of the Company’s peer group (the S&P 500 Gold Index), assuming an initial fixed $100 investment and computed in accordance with the requirements of Item 402(v) of Regulation

S-K,

was $117.47, $135.75, and $132.26 for 2020-2022, 2020-2021 and 2020, respectively. Please see Note 5 and Note 6, above, for additional information related to the computation of Company TSR and peer group TSR, respectively.

Tabular List [Table Text Block]

Financial Performance Measures

As described in greater detail in the Compensation Discussion and Analysis section of this Proxy Statement, the Company’s executive compensation program reflects a

pay-for-performance

philosophy. The metrics that the Company uses for both our long-term and short-term incentive awards are selected based on an objective of incentivizing our NEOs to increase the value of our enterprise for our shareholders. The most important financial performance measures used by the Company to link executive compensation actually paid to the Company’s NEOs, for the most recently completed calendar year, to the Company’s performance are as follows:

•

Adjusted EBITDA Less Capital Expenditures at Operating Mines

•

TSR relative to the peer group described on page 40

Total Shareholder Return Amount

$ 166.27

155.48

191.63

Peer Group Total Shareholder Return Amount

117.47

135.75

132.26

Net Income (Loss)

$ (37,300,000)

$ 35,100,000

$ (9,500,000)

Company Selected Measure Amount

69,841

169,925

130,745

PEO Name

Mr. Baker

Measure [Axis]: 1

Pay vs Performance Disclosure [Table]

Measure Name

Adjusted EBITDA Less Capital Expenditures at Operating Mines

Non-GAAP Measure Description [Text Block]

Adjusted EBITDA Less Capital is calculated as net (loss) income before the following items: interest expense, income tax benefit, depreciation, depletion, and amortization expense,

ramp-up

Measure [Axis]: 2

Pay vs Performance Disclosure [Table]

Measure Name

TSR relative to the peer group described on page 40

PEO [Member] | Add: Total Pension Adjustments [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

$ 315,476

$ 453,979

$ 453,718

PEO [Member] | Pension Adjustments Prior Service Cost [Member]