Hecla Mining (HL) 10-Q 6 May 21 2021 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2021	May 04, 2021
Document Information [Line Items]
Entity Central Index Key	0000719413
Entity Registrant Name	HECLA MINING CO/DE/
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2021
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	1-8491
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0664171
Entity Address, Address Line One	6500 N. Mineral Drive, Suite 200
Entity Address, City or Town	Coeur d'Alene
Entity Address, State or Province	ID
Entity Address, Postal Zip Code	83815-9408
City Area Code	208
Local Phone Number	769-4100
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		535,551,426
Series B Cumulative Preferred Stock [Member]
Document Information [Line Items]
Title of 12(b) Security	Series B Cumulative Convertible Preferred Stock, par value $0.25 per share
Trading Symbol	HL-PB
Security Exchange Name	NYSE
Common Stock [Member]
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.25 per share
Trading Symbol	HL
Security Exchange Name	NYSE

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Sales of products	$ 210,852	$ 136,925
Cost of sales and other direct production costs	96,709	85,887
Depreciation, depletion and amortization	49,331	39,666
Total cost of sales	146,040	125,553
Gross profit	64,812	11,372
Other operating expenses:
General and administrative	8,007	8,939
Exploration	5,951	2,530
Pre-development	739	535
Other operating expense	3,639	920
Ramp-up and suspension costs	4,318	12,996
Provision for closed operations and environmental matters	3,709	516
Total other operating expense	26,363	26,436
Income (loss) from operations	38,449	(15,064)
Other income (expense):
Gain on exchange of investments	1,158	0
Unrealized loss on investments	(3,506)	(978)
Gain on derivative contracts	473	7,893
Net foreign exchange (loss) gain	(2,064)	6,636
Other non-operating expense	(161)	(423)
Interest expense	(10,744)	(16,311)
Total other expense	(14,844)	(3,183)
Income (loss) before income and mining taxes	23,605	(18,247)
Income and mining tax (provision) benefit	(4,634)	1,062
Net income (loss)	18,971	(17,185)
Preferred stock dividends	(138)	(138)
Income (loss) applicable to common stockholders	18,833	(17,323)
Comprehensive income (loss):
Net income (loss)	18,971	(17,185)
Change in fair value of derivative contracts designated as hedge transactions	1,832	(19,335)
Comprehensive income (loss)	$ 20,803	$ (36,520)
Basic income (loss) per common share after preferred dividends (in dollars per share)	$ 0.04	$ (0.03)
Diluted income (loss) per common share after preferred dividends (in dollars per share)	$ 0.03	$ (0.03)
Weighted average number of common shares outstanding - basic (in shares)	534,101	523,215
Weighted average number of common shares outstanding - diluted (in shares)	540,527	523,215
Cash dividends per common share (in dollars per share)	$ 0.00875	$ 0.0025

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities:
Net income (loss)	$ 18,971	$ (17,185)
Non-cash elements included in net income (loss):
Depreciation, depletion and amortization	49,546	41,630
Unrealized loss on investments	3,506	978
Gain on exchange of investments	(1,158)	0
Provision for reclamation and closure costs	4,529	1,548
Stock compensation	500	1,219
Deferred taxes	32	(3,252)
Amortization of loan origination fees and loss on extinguishment of debt	539	2,140
Gain on derivative contracts	(10,962)	(10,437)
Foreign exchange loss (gain)	1,755	(8,066)
Other non-cash items, net	8	(104)
Change in assets and liabilities:
Accounts receivable	(2,664)	9,955
Inventories	2,120	(6,602)
Other current and non-current assets	1,528	(2,642)
Accounts payable and accrued liabilities	(24,545)	(11,879)
Accrued payroll and related benefits	(7,995)	9,495
Accrued taxes	2,031	1,332
Accrued reclamation and closure costs and other non-current liabilities	195	(3,203)
Cash provided by operating activities	37,936	4,927
Investing activities:
Additions to properties, plants, equipment and mineral interests	(21,413)	(19,870)
Proceeds from disposition of properties, plants and equipment	19	154
Net cash used in investing activities	21,394	19,716
Financing activities:
Dividends paid to common stockholders	(4,688)	(1,304)
Dividends paid to preferred stockholders	(138)	(138)
Credit facility fees paid	(82)	(458)
Borrowings on debt	0	679,500
Repayments of debt	0	(506,500)
Repayments of finance leases	(1,881)	(1,284)
Net cash (used in) provided by financing activities	(6,789)	169,816
Effect of exchange rates on cash	167	(1,736)
Net increase in cash, cash equivalents and restricted cash and cash equivalents	9,920	153,291
Cash, cash equivalents and restricted cash and cash equivalents at beginning of period	130,883	63,477
Cash, cash equivalents and restricted cash and cash equivalents at end of period	140,803	216,768
Supplemental disclosure of cash flow information:
Cash paid for interest	18,406	13,984
Significant non-cash investing and financing activities:
Addition of finance lease obligations and right-of-use assets	3,120	0
Accounts receivable for proceeds on exchange of investments	$ 1,832	$ 0

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 139,750	$ 129,830
Accounts receivable:
Trade	35,274	27,864
Other, net	8,475	11,329
Inventories:
Concentrates, doré, and stockpiled ore	56,917	57,936
Materials and supplies	37,335	38,608
Derivatives assets	7,195	3,470
Other current assets	12,971	15,644
Total current assets	297,917	284,681
Investments	11,717	15,148
Restricted cash and investments	1,053	1,053
Properties, plants, equipment and mineral interests, net	2,320,547	2,345,219
Operating lease right-of-use assets	9,775	10,628
Deferred taxes	3,886	2,912
Derivatives assets	6,346	4,558
Other non-current assets	3,836	3,525
Total assets	2,655,077	2,667,724
Current liabilities:
Accounts payable and accrued liabilities	53,130	68,516
Accrued payroll and related benefits	22,800	31,807
Accrued taxes	7,854	8,349
Finance leases	6,706	6,491
Operating leases	2,832	3,008
Accrued reclamation and closure costs	6,592	5,582
Accrued interest	5,175	14,157
Derivatives liabilities	3,906	11,737
Other current liabilities	123	138
Total current liabilities	109,118	149,785
Finance leases	10,304	9,274
Operating leases	6,954	7,634
Accrued reclamation and closure costs	113,671	110,466
Long-term debt	507,992	507,242
Deferred tax liability	149,220	144,330
Pension liability	28,797	44,144
Other non-current liabilities	4,146	4,364
Total liabilities	930,202	977,239
Commitments and contingencies (Notes 4, 7, 8, and 10)
Preferred stock, 5,000,000 shares authorized: Series B preferred stock, $0.25 par value, 157,816 shares issued and outstanding, liquidation preference — $7,891	39	39
Common stock, $0.25 par value, 750,000,000 authorized shares; issued March 31, 2021 — 542,154,997 shares and December 31, 2020 — 538,487,415 shares	135,546	134,629
Capital surplus	2,021,072	2,003,576
Accumulated deficit	(377,229)	(391,374)
Accumulated other comprehensive loss	(31,057)	(32,889)
Less treasury stock, at cost; March 31, 2021 and December 31, 2020 - 6,821,044 shares issued and held in treasury	(23,496)	(23,496)
Total stockholders’ equity	1,724,875	1,690,485
Total liabilities and stockholders’ equity	$ 2,655,077	$ 2,667,724

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Series B preferred stock, par value (in dollars per share)	$ 0.25	$ 0.25
Series B preferred stock, shares issued (in shares)	157,816	157,816
Series B preferred stock, shares outstanding (in shares)	157,816	157,816
Series B preferred stock, liquidation preference	$ 7,891	$ 7,891
Common stock, par value (in dollars per share)	$ 0.25	$ 0.25
Common stock, shares authorized (in shares)	750,000,000	750,000,000
Common stock, shares issued (in shares)	542,154,997	537,487,415
Treasury stock, shares (in shares)	6,821,044	6,821,044

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2019	$ 39	$ 132,292	$ 1,973,700	$ (365,186)	$ (37,310)	$ (22,967)	$ 1,680,568
Net income (loss)	0	0		(17,185)	0	0	(17,185)
Restricted stock units granted	0	0	1,219	0	0	0	1,219
Common stock dividends declared	0	0	0	(1,304)	0	0	(1,304)
Series B Preferred Stock dividends declared	0	0	0	(138)	0	0	(138)
Common stock issued for 401(k) match	0	89	1,114	0	0	0	1,203
Other comprehensive income (loss)	0	0	0	0	(19,335)	0	(19,335)
Balances at Mar. 31, 2020	39	132,381	1,976,033	(383,813)	(56,645)	(22,967)	1,645,028
Balance at Dec. 31, 2020	39	134,629	2,003,576	(391,374)	(32,889)	(23,496)	1,690,485
Net income (loss)	0	0		18,971	0	0	18,971
Restricted stock units granted	0	0	483	0	0	0	483
Common stock dividends declared	0	0	0	(4,688)	0	0	(4,688)
Series B Preferred Stock dividends declared	0	0	0	(138)	0	0	(138)
Common stock issued for 401(k) match	0	42	1,088	0	0	0	1,130
Shares issued to pension plans	0	875	15,925	0	0	0	16,800
Other comprehensive income (loss)	0	0	0	0	1,832	0	1,832
Balances at Mar. 31, 2021	$ 39	$ 135,546	$ 2,021,072	$ (377,229)	$ (31,057)	$ (23,496)	$ 1,724,875

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Common stock dividends declared, per common share (in dollars per share)	$ 0.00875	$ 0.0025
Preferred stock dividends declared, per share (in dollars per share)	$ 0.875	$ 0.875
Common stock issued for 401(k) match, shares (in shares)	165,000	352,000
Shares issued to pension plans, shares (in shares)	3,500,000

Note 1 - Basis of Preparation o

Note 1 - Basis of Preparation of Financial Statements	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]	1. Basis of Preparation of Financial Statements The accompanying unaudited interim condensed consolidated financial statements of Hecla Mining Company and its subsidiaries (collectively, “Hecla”, “the Company”, “we”, “our” or “us”, except where the context requires otherwise) have been prepared in accordance with the instructions to Form 10 not 10 December 31, 2020 “2020 10 December 31, 2020 three March 31, 2021 not may December 31, 2021. The 2019 19" March 11, 2020, 19 March 2020, 19, March 24, 2020 April 15, 2020 April 2020, May 30, 2020. March first 2020 2020 first 2021 2020 March 2020. 19 first 2021. We have taken precautionary measures to mitigate the impact of COVID- 19, may 19 Correction of an Immaterial Error During the first 2021 Cost of sales and other direct production costs Income and mining tax provision January 1, 2021. January 1, 2019 January 1, 2020 10

Note 2 - Business Segments and

Note 2 - Business Segments and Sales of Products	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	Note 2. Business Segments and Sales of Products We discover, acquire and develop mines and other mineral interests and produce and market concentrates, carbon material and doré containing silver, gold, lead and zinc. We are currently organized and managed in five General corporate activities not not The following tables present information about our reportable segments for the three March 31, 2021 2020 Three Months Ended 2021 2020 Net sales to unaffiliated customers: Greens Creek $ 98,409 $ 53,833 Lucky Friday 29,122 2,830 Casa Berardi 72,911 46,172 San Sebastian 173 9,927 Nevada Operations 10,237 24,163 $ 210,852 $ 136,925 Income (loss) from operations: Greens Creek $ 44,600 $ 4,117 Lucky Friday 6,323 (8,120 ) Casa Berardi 9,117 (3,880 ) San Sebastian (2,263 ) 679 Nevada Operations (3,140 ) 2,889 Other (16,188 ) (10,749 ) $ 38,449 $ (15,064 ) The following table presents identifiable assets by reportable segment as of March 31, 2021 December 31, 2020 March 31, 2021 December 31, 2020 Identifiable assets: Greens Creek $ 609,612 $ 610,360 Lucky Friday 513,645 520,463 Casa Berardi 683,103 694,522 San Sebastian 41,238 42,617 Nevada Operations 510,514 513,309 Other 296,965 286,453 $ 2,655,077 $ 2,667,724 Sales of products by metal for the three March 31, 2021 2020 Three Months Ended March 31, 2021 2020 Silver $ 77,760 $ 37,572 Gold 101,408 90,694 Lead 15,893 6,420 Zinc 29,191 17,308 Less: Smelter and refining charges (13,400 ) (15,069 ) Sales of products $ 210,852 $ 136,925 Sales of products for the first three 2021 2020 Note 8

Note 3 - Income Taxes

Note 3 - Income Taxes	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 3. Income and Mining Taxes Major components of our income and mining tax (provision) benefit for the three March 31, 2021 2020 Three Months Ended March 31, 2021 2020 Current: Domestic $ (2,277 ) $ (732 ) Foreign (2,286 ) (2,069 ) Total current income and mining tax provision (4,563 ) (2,801 ) Deferred: Domestic 319 1,250 Foreign (390 ) 2,613 Total deferred income and mining tax (provision) benefit (71 ) 3,863 Total income and mining tax (provision) benefit $ (4,634 ) $ 1,062 The income and mining tax (provision) benefit for the three March 31, 2021 2020 Effective January 1, 2021, Cost of Sales and other direct production costs Income and mining tax (provision) benefit three March 31, 2021

Note 4 - Employee Benefit Plans

Note 4 - Employee Benefit Plans	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Retirement Benefits [Text Block]	Note 4. Employee Benefit Plans We sponsor defined benefit pension plans covering substantially all U.S. employees. Net periodic pension cost for the plans consisted of the following for the three March 31, 2021 2020 Three Months Ended March 31, 2021 2020 Service cost $ 1,455 $ 1,334 Interest cost 1,248 1,404 Expected return on plan assets (2,313 ) (1,872 ) Amortization of prior service cost 99 29 Amortization of net loss 1,125 1,163 Net periodic pension cost $ 1,614 $ 2,058 The service cost component of net periodic pension cost is included in the same line items of our condensed consolidated financial statements as other employee compensation costs, and the net expense for the three March 31, 2021 2020 In January 2021, 2021. not 2021, may

Note 5 - Income (Loss) Per Comm

Note 5 - Income (Loss) Per Common Share	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Earnings Per Share [Text Block]	Note 5. Income (Loss) Per Common Share We calculate basic income (loss) per common share on the basis of the weighted average number of shares of common stock outstanding during the period. Diluted income per share is calculated using the weighted average number of shares of common stock outstanding during the period plus the effect of potential dilutive common shares during the period using the treasury stock and if-converted methods. Potential dilutive shares of common stock include outstanding unvested restricted stock awards, performance-based share awards, stock units, warrants and convertible preferred stock for periods in which we have reported net income. For periods in which we report net losses, potential dilutive shares of common stock are excluded, as their conversion and exercise would be anti-dilutive. The following table represents net income (loss) per common share – basic and diluted (in thousands, except income (loss) per share): Three Months Ended March 31, 2021 2020 Numerator Net income (loss) $ 18,971 $ (17,185 ) Preferred stock dividends (138 ) (138 ) Net income (loss) applicable to common shares $ 18,833 $ (17,323 ) Denominator Basic weighted average common shares 534,101 523,215 Dilutive restricted stock units, warrants and deferred shares 6,426 — Diluted weighted average common shares 540,527 523,215 Basic income (loss) per common share $ 0.04 $ (0.03 ) Diluted income (loss) per common share $ 0.03 $ (0.03 ) Diluted income (loss) per share for the three March 31, 2021 2020 no For the three March 31, 2021, one three March 31, 2020, no

Note 6 - Stockholders' Equity

Note 6 - Stockholders' Equity	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	Note 6. Stockholders Equity Stock-based Compensation Plans Stock-based compensation expense for restricted stock unit and performance-based grants to employees and shares issued to non-employee directors totaled $0.5 million and $1.2 million for the first three 2021 2020, Common Stock Dividends On February 18, 2021, March 2021. fourth 2020 During May 2021, first 2021 Quarterly Average Realized Silver Price per Ounce Quarterly Silver-Linked Dividend per Share Annualized Silver-Linked Dividend per Share Annualized Minimum Dividend Annualized Dividends per Share: Silver-Linked and Minimum $25 $0.0075 $0.03 $0.015 $0.045 $30 $0.0125 $0.05 $0.015 $0.065 $35 $0.0225 $0.09 $0.015 $0.105 $40 $0.0325 $0.13 $0.015 $0.145 $45 $0.0425 $0.17 $0.015 $0.185 $50 $0.0525 $0.21 $0.015 $0.225 At-The-Market Equity Distribution Agreement Pursuant to an equity distribution agreement dated February 18, 2021, may not may 1933, 3. March 31, 2021.

Note 7 - Debt, Credit Facility

Note 7 - Debt, Credit Facility and Leases	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Debt Disclosure [Text Block]	Note 7. Debt, Credit Facility and Leases Our debt as of March 31, 2021 December 31, 2020 February 15, 2028 ( 2020 July 9, 2025 ( March 31, 2021 December 31, 2020 March 31, 2021 Senior Notes IQ Notes Total Principal $ 475,000 $ 38,359 $ 513,359 Unamortized discount/premium and issuance costs (6,234 ) 867 (5,367 ) Long-term debt balance $ 468,766 $ 39,226 $ 507,992 December 31, 2020 Senior Notes IQ Notes Total Principal $ 475,000 $ 37,886 $ 512,886 Unamortized discount/premium and issuance costs (6,462 ) 818 (5,644 ) Long-term debt balance $ 468,538 $ 38,704 $ 507,242 The following table summarizes the scheduled annual future payments, including interest, for our Senior Notes, IQ Notes, and finance and operating leases as of March 31, 2021 March 31, 2021. Twelve-month period ending March 31, Senior Notes IQ Notes Finance Leases Operating Leases 2022 $ 34,438 $ 2,499 $ 7,329 $ 3,696 2023 34,438 2,499 5,132 2,706 2024 34,438 2,499 3,643 2,002 2025 34,438 2,499 2,076 549 2026 34,438 39,045 — 525 Thereafter 539,568 — — 2,213 Total $ 711,758 $ 49,041 $ 18,180 $ 11,691 Credit Facility In July 2018, February 7, 2023. March 31, 2021 December 31, 2020, We are also able to obtain letters of credit under the facility, and for any such letters we are required to pay a participation fee of between 2.25% and 4.00% of the amount of the letters of credit based on our total leverage ratio, as well as a fronting fee to each issuing bank of 0.20% annually on the average daily dollar amount of any outstanding letters of credit. There were $20.3 million in letters of credit outstanding as of March 31, 2021. We believe we were in compliance with all covenants under the credit agreement as of March 31, 2021.

Note 8 - Derivative Instruments

Note 8 - Derivative Instruments	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Derivative Instruments and Hedging Activities Disclosure [Text Block]	Note 8. Derivative Instruments General Our current risk management policy provides that up to 75% of: • our future foreign currency-related operating cost exposure for five may • our planned lead and zinc metals price exposure for five These instruments do, however, expose us to (i) credit risk in the form of non-performance by counterparties for contracts in which the contract price exceeds the spot price of the hedged commodity or foreign currency and (ii) price risk to the extent that the spot price exceeds the contract price for quantities of our production and/or forecasted costs covered under contract positions. Foreign Currency Our wholly-owned subsidiaries owning the Casa Berardi and San Sebastian operations are USD-functional entities which routinely incur expenses denominated in CAD and Mexican pesos ("MXN"), respectively. Such expenses expose us to exchange rate fluctuations between the USD and CAD and MXN. We have a program to manage our exposure to fluctuations in the exchange rate between the USD and CAD and MXN for these subsidiaries' future operating costs denominated in CAD and MXN. The programs utilize forward contracts to buy CAD and MXN, and each contract is designated as a cash flow hedge. As of March 31, 2021, CAD$256.8 USD$194.8 2021 2024 March 31, 2021. As of March 31, 2021 December 31, 2020, March 31, December 31, Balance sheet line item: 2021 2020 Current derivatives assets $ 5.0 $ 3.5 Non-current derivatives assets 4.2 4.2 Net unrealized gains of approximately $9.5 million related to the effective portion of the hedges were included in accumulated other comprehensive loss as of March 31, 2021. March 31, 2021 twelve three March 31, 2021. three March 31, 2021. Metals Prices We are currently using financially-settled forward contracts to manage the exposure to: • changes in prices of silver, gold, zinc and lead contained in our concentrate shipments between the time of shipment and final settlement; and • changes in prices of zinc and lead (but not The following tables summarize the quantities of metals committed under forward sales contracts at March 31, 2021 December 31, 2020: March 31, 2021 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 2021 settlements 1,492 5 12,070 1,587 $ 25.48 $ 1,736 $ 1.26 $ 0.89 Contracts on forecasted sales 2021 settlements — — 33,841 30,479 N/A N/A $ 1.20 $ 0.89 2022 settlements — — 53,407 42,715 N/A N/A $ 1.26 $ 0.96 2023 settlements — — 41,171 — N/A N/A $ 1.27 N/A December 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 2021 settlements 1,282 4 23,314 4,905 $ 25.00 $ 1,858 $ 1.19 $ 0.90 Contracts on forecasted sales 2021 settlements — — 41,577 30,876 N/A N/A $ 1.17 $ 0.88 2022 settlements — — 18,519 — N/A N/A $ 1.28 N/A In June 2019, not December 31, 2020, March 31, 2021. These forward and put option contracts are not We recorded the following balances for the fair value of the forward contracts as of March 31, 2021 December 31, 2020 March 31, 2021 December 31, 2020 Balance sheet line item: Contracts in an asset position Contracts in a liability position Net asset (liability) Contracts in an asset position Contracts in a liability position Net asset (liability) Current derivatives assets $ 3.3 $ (1.1 ) $ 2.2 $ 0.2 $ (0.2 ) $ — Non-current derivatives assets 2.3 (0.2 ) 2.1 0.5 (0.1 ) 0.4 Current derivatives liability — (3.9 ) (3.9 ) 0.1 (11.8 ) (11.7 ) Other non-current liabilities 0.4 (1.2 ) (0.8 ) — — — We recognized $2.8 million and $1.7 million net gains during the first 2021 2020, We recognized $0.5 million and $7.9 million net gains during the first 2021 2020, first 2021 Credit-risk-related Contingent Features Certain of our derivative contracts contain cross default provisions which provide that a default under our revolving credit agreement would cause a default under the derivative contract. As of March 31, 2021, not March 31, 2021, March 31, 2021,

Note 9 - Fair Value Measurement

Note 9 - Fair Value Measurement	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 9. Fair Value Measurement Accounting guidance has established a hierarchy for inputs used to measure assets and liabilities at fair value on a recurring basis. The three Level 1: Level 2: Level 3: The table below sets forth our assets and liabilities that were accounted for at fair value on a recurring basis and the fair value calculation input hierarchy level that we have determined applies to each asset and liability category (in thousands). Description Balance at March 31, 2021 Balance at December 31, 2020 Input Hierarchy Level Assets: Cash and cash equivalents: Money market funds and other bank deposits $ 139,750 $ 129,830 Level 1 Current and non-current investments: Equity securities – mining industry 11,717 19,389 Level 1 Trade accounts receivable: Receivables from provisional concentrate sales 35,274 27,864 Level 2 Restricted cash balances: Certificates of deposit and other bank deposits 1,053 1,053 Level 1 Derivative contracts - current and non-current derivatives assets: Metal forward and put option contracts 4,349 381 Level 2 Foreign exchange contracts 9,192 7,647 Level 2 Total assets $ 201,335 $ 186,164 Liabilities: Derivative contracts - current derivatives liabilities and other non-current liabilities: Metal forward and put option contracts $ 4,742 $ 11,737 Level 2 Foreign exchange contracts — 19 Level 2 Total Liabilities $ 4,742 $ 11,756 Cash and cash equivalents consist primarily of money market funds and are valued at cost, which approximates fair value, and a small portion consists of municipal bonds having maturities of less than 90 Current and non-current restricted cash balances consist primarily of certificates of deposit, U.S. Treasury securities, and other deposits and are valued at cost, which approximates fair value. Our non-current available for sale securities consist of marketable equity securities of companies in the mining industry which are valued using quoted market prices for each security. Trade accounts receivable from provisional concentrate sales are subject to final pricing and valued using quoted prices based on forward curves for the particular metal. The embedded derivative contained in our concentrate sales is adjusted to fair market value through earnings each period prior to final settlement. We use financially-settled forward contracts to manage exposure to changes in the exchange rate between USD and CAD and MXN, and the impact on CAD- and MXN-denominated operating costs incurred at our Casa Berardi and San Sebastian units (see Note 8 We use financially-settled forward contracts to manage the exposure to changes in prices of silver, gold, zinc and lead contained in our concentrate shipments that have not Note 8 Our Senior Notes, which were recorded at their carrying value of $468.8 million, net of unamortized initial purchaser discount and issuance costs, had a fair value of $509.7 million at March 31, 2021. 1 Note 7

Note 10 - Commitments, Continge

Note 10 - Commitments, Contingencies and Obligations	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	Note 10. Commitments, Contingencies and Obligations General We follow GAAP guidance in determining our accruals and disclosures with respect to loss contingencies, and evaluate such accruals and contingencies for each reporting period. Accordingly, estimated losses from loss contingencies are accrued by a charge to income when information available prior to issuance of the financial statements indicates that it is probable that a liability could be incurred and the amount of the loss can be reasonably estimated. Legal expenses associated with the contingency are expensed as incurred. If a loss contingency is not Lucky Friday Water Permit Matters In December 2013, 308 no. 3 December 2015. may Johnny M Mine Area near San Mateo, McKinley County and San Mateo Creek Basin, New Mexico In May 2011, may August 2012, not December 2014 January 2021, first 2021 December 31, 2020) The Johnny M Mine is in an area known as the San Mateo Creek Basin (“SMCB”), which is an approximately 321 not not may $9.0 In July 2018, may Carpenter Snow Creek and Barker-Hughesville Sites in Montana In July 2010, 1980s 6 1988. In June 2011, may may In February 2017, April 2017. June December 1983, In August 2018, may not Claim for Indemnification Against CoCa Mines, Inc. In 1991, 2014 2019, 1989 may 2016, may October 30, 2019, Litigation Related to Klondex Acquisition On May 24, 2019, one March 19, 2018 May 8, 2019, 10 20 1934 10b 5 first 2021. Debt See Note 7 March 31, 2021. Other Commitments Our contractual obligations as of March 31, 2021 March 31, 2021 Note 7 March 31, 2021, Other Contingencies We also have certain other contingencies resulting from litigation, claims, EPA investigations, and other commitments and are subject to a variety of environmental and safety laws and regulations incident to the ordinary course of business. We currently have no may may no not

Note 11 - Developments in Accou

Note 11 - Developments in Accounting Pronouncements	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Accounting Standards Update and Change in Accounting Principle [Text Block]	Note 11. Developments in Accounting Pronouncements Accounting Standards Updates Adopted In December 2019, No. 2019 12 740 December 15, 2020, January 1, 2021, not Accounting Standards Updates to Become Effective in Future Periods In August 2020, No. 2020 06 470 20 815 40 December 15, 2021,

Note 2 - Business Segments an_2

Note 2 - Business Segments and Sales of Products (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Three Months Ended 2021 2020 Net sales to unaffiliated customers: Greens Creek $ 98,409 $ 53,833 Lucky Friday 29,122 2,830 Casa Berardi 72,911 46,172 San Sebastian 173 9,927 Nevada Operations 10,237 24,163 $ 210,852 $ 136,925 Income (loss) from operations: Greens Creek $ 44,600 $ 4,117 Lucky Friday 6,323 (8,120 ) Casa Berardi 9,117 (3,880 ) San Sebastian (2,263 ) 679 Nevada Operations (3,140 ) 2,889 Other (16,188 ) (10,749 ) $ 38,449 $ (15,064 ) March 31, 2021 December 31, 2020 Identifiable assets: Greens Creek $ 609,612 $ 610,360 Lucky Friday 513,645 520,463 Casa Berardi 683,103 694,522 San Sebastian 41,238 42,617 Nevada Operations 510,514 513,309 Other 296,965 286,453 $ 2,655,077 $ 2,667,724
Revenue from External Customers by Products and Services [Table Text Block]	Three Months Ended March 31, 2021 2020 Silver $ 77,760 $ 37,572 Gold 101,408 90,694 Lead 15,893 6,420 Zinc 29,191 17,308 Less: Smelter and refining charges (13,400 ) (15,069 ) Sales of products $ 210,852 $ 136,925

Note 3 - Income Taxes (Tables)

Note 3 - Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Three Months Ended March 31, 2021 2020 Current: Domestic $ (2,277 ) $ (732 ) Foreign (2,286 ) (2,069 ) Total current income and mining tax provision (4,563 ) (2,801 ) Deferred: Domestic 319 1,250 Foreign (390 ) 2,613 Total deferred income and mining tax (provision) benefit (71 ) 3,863 Total income and mining tax (provision) benefit $ (4,634 ) $ 1,062

Note 4 - Employee Benefit Pla_2

Note 4 - Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Schedule of Net Benefit Costs [Table Text Block]	Three Months Ended March 31, 2021 2020 Service cost $ 1,455 $ 1,334 Interest cost 1,248 1,404 Expected return on plan assets (2,313 ) (1,872 ) Amortization of prior service cost 99 29 Amortization of net loss 1,125 1,163 Net periodic pension cost $ 1,614 $ 2,058

Note 5 - Income (Loss) Per Co_2

Note 5 - Income (Loss) Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended March 31, 2021 2020 Numerator Net income (loss) $ 18,971 $ (17,185 ) Preferred stock dividends (138 ) (138 ) Net income (loss) applicable to common shares $ 18,833 $ (17,323 ) Denominator Basic weighted average common shares 534,101 523,215 Dilutive restricted stock units, warrants and deferred shares 6,426 — Diluted weighted average common shares 540,527 523,215 Basic income (loss) per common share $ 0.04 $ (0.03 ) Diluted income (loss) per common share $ 0.03 $ (0.03 )

Note 6 - Stockholders' Equity (

Note 6 - Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Schedule of Potential Per Share Dividend Amounts Quarterly Price Levels [Table Text Block]	Quarterly Average Realized Silver Price per Ounce Quarterly Silver-Linked Dividend per Share Annualized Silver-Linked Dividend per Share Annualized Minimum Dividend Annualized Dividends per Share: Silver-Linked and Minimum $25 $0.0075 $0.03 $0.015 $0.045 $30 $0.0125 $0.05 $0.015 $0.065 $35 $0.0225 $0.09 $0.015 $0.105 $40 $0.0325 $0.13 $0.015 $0.145 $45 $0.0425 $0.17 $0.015 $0.185 $50 $0.0525 $0.21 $0.015 $0.225

Note 7 - Debt, Credit Facilit_2

Note 7 - Debt, Credit Facility and Leases (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Schedule of Long-term Debt Instruments [Table Text Block]	March 31, 2021 Senior Notes IQ Notes Total Principal $ 475,000 $ 38,359 $ 513,359 Unamortized discount/premium and issuance costs (6,234 ) 867 (5,367 ) Long-term debt balance $ 468,766 $ 39,226 $ 507,992 December 31, 2020 Senior Notes IQ Notes Total Principal $ 475,000 $ 37,886 $ 512,886 Unamortized discount/premium and issuance costs (6,462 ) 818 (5,644 ) Long-term debt balance $ 468,538 $ 38,704 $ 507,242
Schedule of Maturities of Long Term Debt and Finance and Operating Lease Liabilities [Table Text Block]	Twelve-month period ending March 31, Senior Notes IQ Notes Finance Leases Operating Leases 2022 $ 34,438 $ 2,499 $ 7,329 $ 3,696 2023 34,438 2,499 5,132 2,706 2024 34,438 2,499 3,643 2,002 2025 34,438 2,499 2,076 549 2026 34,438 39,045 — 525 Thereafter 539,568 — — 2,213 Total $ 711,758 $ 49,041 $ 18,180 $ 11,691

Note 8 - Derivative Instrumen_2

Note 8 - Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Schedule of Foreign Exchange Contracts, Statement of Financial Position [Table Text Block]	March 31, December 31, Balance sheet line item: 2021 2020 Current derivatives assets $ 5.0 $ 3.5 Non-current derivatives assets 4.2 4.2
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]	March 31, 2021 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 2021 settlements 1,492 5 12,070 1,587 $ 25.48 $ 1,736 $ 1.26 $ 0.89 Contracts on forecasted sales 2021 settlements — — 33,841 30,479 N/A N/A $ 1.20 $ 0.89 2022 settlements — — 53,407 42,715 N/A N/A $ 1.26 $ 0.96 2023 settlements — — 41,171 — N/A N/A $ 1.27 N/A December 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 2021 settlements 1,282 4 23,314 4,905 $ 25.00 $ 1,858 $ 1.19 $ 0.90 Contracts on forecasted sales 2021 settlements — — 41,577 30,876 N/A N/A $ 1.17 $ 0.88 2022 settlements — — 18,519 — N/A N/A $ 1.28 N/A
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]	March 31, 2021 December 31, 2020 Balance sheet line item: Contracts in an asset position Contracts in a liability position Net asset (liability) Contracts in an asset position Contracts in a liability position Net asset (liability) Current derivatives assets $ 3.3 $ (1.1 ) $ 2.2 $ 0.2 $ (0.2 ) $ — Non-current derivatives assets 2.3 (0.2 ) 2.1 0.5 (0.1 ) 0.4 Current derivatives liability — (3.9 ) (3.9 ) 0.1 (11.8 ) (11.7 ) Other non-current liabilities 0.4 (1.2 ) (0.8 ) — — —

Note 9 - Fair Value Measureme_2

Note 9 - Fair Value Measurement (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Description Balance at March 31, 2021 Balance at December 31, 2020 Input Hierarchy Level Assets: Cash and cash equivalents: Money market funds and other bank deposits $ 139,750 $ 129,830 Level 1 Current and non-current investments: Equity securities – mining industry 11,717 19,389 Level 1 Trade accounts receivable: Receivables from provisional concentrate sales 35,274 27,864 Level 2 Restricted cash balances: Certificates of deposit and other bank deposits 1,053 1,053 Level 1 Derivative contracts - current and non-current derivatives assets: Metal forward and put option contracts 4,349 381 Level 2 Foreign exchange contracts 9,192 7,647 Level 2 Total assets $ 201,335 $ 186,164 Liabilities: Derivative contracts - current derivatives liabilities and other non-current liabilities: Metal forward and put option contracts $ 4,742 $ 11,737 Level 2 Foreign exchange contracts — 19 Level 2 Total Liabilities $ 4,742 $ 11,756

Note 1 - Basis of Preparation_2

Note 1 - Basis of Preparation of Financial Statements (Details Textual) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)oz	Jan. 01, 2021USD ($)
Retained Earnings (Accumulated Deficit), Ending Balance	$ (377,229)	$ (391,374)	$ 365,200
Recognition of Previously Omitted Deferred Income Taxes on Certain State Mining Income Taxes [Member]
Retained Earnings (Accumulated Deficit), Ending Balance			$ (11,900)
Casa Berardi [Member]
Decrease in Expected Gold Production Due to Suspension (Ounce) | oz		11,700
Suspension Costs		$ 1,600
San Sebastian [Member]
Suspension Costs		1,800
Greens Creek [Member]
Suspension Costs from Quarantining Employee Per Week	$ 600	$ 2,300

Note 2 - Business Segments an_3

Note 2 - Business Segments and Sales of Products (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)	Mar. 31, 2020USD ($)
Number of Reportable Segments	5
Derivative, Gain on Derivative	$ 2.8	$ 1.7

Note 2 - Business Segments an_4

Note 2 - Business Segments and Sales of Products - Information About Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 30, 2021	Dec. 31, 2020
Net sales	$ 210,852	$ 136,925
Income (loss) from operations	38,449	(15,064)
Identifiable assets	2,655,077		$ 2,655,077	$ 2,667,724
Greens Creek [Member]
Net sales	98,409	53,833
Income (loss) from operations	44,600	4,117
Identifiable assets			609,612	610,360
Lucky Friday [Member]
Net sales	29,122	2,830
Income (loss) from operations	6,323	(8,120)
Identifiable assets			513,645	520,463
Casa Berardi [Member]
Net sales	72,911	46,172
Income (loss) from operations	9,117	(3,880)
Identifiable assets			683,103	694,522
San Sebastian [Member]
Net sales	173	9,927
Income (loss) from operations	(2,263)	679
Identifiable assets			41,238	42,617
Nevada Operations [Member]
Net sales	10,237	24,163
Income (loss) from operations	(3,140)	2,889
Identifiable assets			510,514	513,309
Other Segments [Member]
Income (loss) from operations	$ (16,188)	$ (10,749)
Identifiable assets			$ 296,965	$ 286,453

Note 2 - Business Segments an_5

Note 2 - Business Segments and Sales of Products - Sales of Products (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Sales of products	$ 210,852	$ 136,925
Less: Smelter and refining charges	(13,400)	(15,069)
Silver Contracts [Member]
Sales of products	77,760	37,572
Gold [Member]
Sales of products	101,408	90,694
Lead [Member]
Sales of products	15,893	6,420
Zinc [Member]
Sales of products	$ 29,191	$ 17,308

Note 3 - Income Taxes (Details

Note 3 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Tax Expense (Benefit), Total	$ 4,634	$ (1,062)
Recognition of Previously Omitted Deferred Income Taxes on Certain State Mining Income Taxes [Member]
Income Tax Expense (Benefit), Total	$ 3,100

Note 3 - Income Taxes - Major C

Note 3 - Income Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Domestic	$ (2,277)	$ (732)
Foreign	(2,286)	(2,069)
Total current income and mining tax provision	(4,563)	(2,801)
Domestic	319	1,250
Foreign	(390)	2,613
Total deferred income and mining tax (provision) benefit	(71)	3,863
Total income and mining tax (provision) benefit	$ (4,634)	$ 1,062

Note 4 - Employee Benefit Pla_3

Note 4 - Employee Benefit Plans (Details Textual) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Jan. 31, 2021	Mar. 31, 2021	Mar. 31, 2020
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 16.8
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year		$ 0.8
Other Nonoperating Income (Expense) [Member]
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component		$ 0.2	$ 0.7

Note 4 - Employee Benefit Pla_4

Note 4 - Employee Benefit Plans - Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Service cost	$ 1,455	$ 1,334
Interest cost	1,248	1,404
Expected return on plan assets	(2,313)	(1,872)
Amortization of prior service cost	99	29
Amortization of net loss	1,125	1,163
Net periodic pension cost	$ 1,614	$ 2,058

Note 5 - Income (Loss) Per Co_3

Note 5 - Income (Loss) Per Common Share (Details Textual)	3 Months Ended
	Mar. 31, 2021shares
Incremental Common Shares Attributable to Share-based Payment Arrangements, Total (in shares)	2,863,038
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants (in shares)	1,536,615
Incremental Common Shares Attributable to Dilutive Effect of Deferred Shares (in shares)	2,026,440

Note 5 - Income (Loss) Per Co_4

Note 5 - Income (Loss) Per Common Share - Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net income (loss)	$ 18,971	$ (17,185)
Series B Preferred Stock dividends declared	(138)	(138)
Income (loss) applicable to common stockholders	$ 18,833	$ (17,323)
Weighted average number of common shares outstanding - basic (in shares)	534,101	523,215
Dilutive restricted stock units, warrants and deferred shares (in shares)	6,426	0
Diluted weighted average common shares (in shares)	540,527	523,215
Basic income (loss) per common share after preferred dividends (in dollars per share)	$ 0.04	$ (0.03)
Diluted income (loss) per common share after preferred dividends (in dollars per share)	$ 0.03	$ (0.03)

Note 6 - Stockholders' Equity_2

Note 6 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, shares in Thousands	1 Months Ended		3 Months Ended
	Mar. 31, 2021	Mar. 31, 2021	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	May 06, 2021	Feb. 18, 2021	Feb. 16, 2021
Share-based Payment Arrangement, Expense			$ 500,000		$ 1,200,000
Quarterly Dividends, Common Stock, Cash (in dollars per share)								$ 0.00875
Quarterly Dividends, Common Stock, Cash, Silver Price-linked Component (in dollars per share)								0.00375
Quarterly Dividends, Common Stock, Cash, Minimum Annual Dividend Component (in dollars per share)								$ 0.005
Dividends, Total	$ 4,700,000
Average Realized Silver Price Per Ounce				$ 25.16
Average Realized Silver Price, Minimum Dividend, Threshold (in dollars per share)	$ 25.66	$ 25.66	$ 25.66
At-the-market Offering [Member]
Equity Distribution Agreement, Maximum Number of Shares to be Sold (in shares)							60,000
Stock Issued During Period, Shares, New Issues (in shares)		0
Subsequent Event [Member]
Quarterly Dividends, Common Stock, Cash (in dollars per share)						$ 0.01
Quarterly Dividends, Common Stock, Cash, Silver Price-linked Component (in dollars per share)						$ 0.075

Note 6 - Stockholders' Equity -

Note 6 - Stockholders' Equity - Common Stock Dividend Policy (Details)	3 Months Ended
	Mar. 31, 2021$ / shares
Quarterly Average Realized Price, Level 1 [Member]
Quarterly dividend per share (in dollars per share)	$ 0.0075
Annual dividend per share (in dollars per share)	0.03
Minimum annual component per share (in dollars per share)	0.015
Annualized dividends (in dollars per share)	0.045
Quarterly Average Realized Price, Level 2 [Member]
Quarterly dividend per share (in dollars per share)	0.0125
Annual dividend per share (in dollars per share)	0.05
Minimum annual component per share (in dollars per share)	0.015
Annualized dividends (in dollars per share)	0.065
Quarterly Average Realized Price, Level 3 [Member]
Quarterly dividend per share (in dollars per share)	0.0225
Annual dividend per share (in dollars per share)	0.09
Minimum annual component per share (in dollars per share)	0.015
Annualized dividends (in dollars per share)	0.105
Quarterly Average Realized Price, Level 4 [Member]
Quarterly dividend per share (in dollars per share)	0.0325
Annual dividend per share (in dollars per share)	0.13
Minimum annual component per share (in dollars per share)	0.015
Annualized dividends (in dollars per share)	0.145
Quarterly Average Realized Price, Level 5 [Member]
Quarterly dividend per share (in dollars per share)	0.0425
Annual dividend per share (in dollars per share)	0.17
Minimum annual component per share (in dollars per share)	0.015
Annualized dividends (in dollars per share)	0.185
Quarterly Average Realized Price, Level 6 [Member]
Quarterly dividend per share (in dollars per share)	0.0525
Annual dividend per share (in dollars per share)	0.21
Minimum annual component per share (in dollars per share)	0.015
Annualized dividends (in dollars per share)	$ 0.225

Note 7 - Debt, Credit Facilit_3

Note 7 - Debt, Credit Facility and Leases (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Jul. 31, 2018
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 250,000
Long-term Line of Credit, Total	$ 0	$ 0
Letters of Credit Outstanding, Amount	$ 20,300
Letter of Credit [Member]
Letter of Credit Outstanding, Fronting Fee			0.20%
Letter of Credit [Member] | Minimum [Member]
Letter of Credit, Participation Fee, Percent			2.25%
Letter of Credit [Member] | Maximum [Member]
Letter of Credit, Participation Fee, Percent			4.00%
Senior Notes [Member] | The 2028 Senior Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	7.25%	7.25%

Note 7 - Debt, Credit Facilit_4

Note 7 - Debt, Credit Facility and Leases - Debt Summary (Details) - Senior Notes [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Principal	$ 513,359	$ 512,886
Unamortized discount/premium and issuance costs	(5,367)	(5,644)
Long-term debt balance	507,992	507,242
The 2028 Senior Notes [Member]
Principal	475,000	475,000
Unamortized discount/premium and issuance costs	(6,234)	(6,462)
Long-term debt balance	468,766	468,538
IQ Notes [Member]
Principal	38,359	37,886
Unamortized discount/premium and issuance costs	867	818
Long-term debt balance	$ 39,226	$ 38,704

Note 7 - Debt, Credit Facilit_5

Note 7 - Debt, Credit Facility and Leases - Future Payments of Long-term Debt and Finance and Operating Leases (Details) $ in Thousands	Mar. 31, 2021USD ($)
2022, finance leases	$ 7,329
2022, operating leases	3,696
2023, finance leases	5,132
2023, operating leases	2,706
2024, finance leases	3,643
2024, operating leases	2,002
2025, finance leases	2,076
2025, operating leases	549
2026, finance leases	0
2026, operating leases	525
Thereafter, finance leases	0
Thereafter, operating leases	2,213
Total, finance leases	18,180
Total, operating leases	11,691
Senior Notes [Member] | The 2028 Senior Notes [Member]
2022	34,438
2023	34,438
2024	34,438
2025	34,438
2026	34,438
Thereafter	539,568
Total	711,758
Senior Notes [Member] | IQ Notes [Member]
2022	2,499
2023	2,499
2024	2,499
2025	2,499
2026	39,045
Thereafter	0
Total	$ 49,041

Note 8 - Derivative Instrumen_3

Note 8 - Derivative Instruments (Details Textual) $ in Thousands, $ in Thousands, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2021USD ($)oz	Mar. 31, 2020USD ($)	Dec. 31, 2020oz$ / oz	Mar. 31, 2021CAD ($)	Mar. 31, 2021MXN ($)
Maximum Allocation of Forecasted CAD-demonimated Operating Costs	75.00%			75.00%	75.00%
Forecasted CAD-denominated Operating Costs to be Hedged, Term (Year)	5 years
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax, Ending Balance	$ 9,500
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	600
Gain (Loss) on Components Excluded from Assessment of Foreign Currency Cash Flow Hedge Effectiveness	0
Derivative, Gain (Loss) on Derivative, Net, Total	10,962	$ 10,437
Other Comprehensive Income (Loss) [Member]
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	$ 4,800
Foreign Exchange Contract [Member] | Casa Berardi [Member] | Designated as Hedging Instrument [Member]
Derivative, Number of Instruments Held, Total	133			133	133
Derivative, Notional Amount	$ 194,800			$ 256.8	$ 0
Foreign Exchange Contract [Member] | Casa Berardi [Member] | Designated as Hedging Instrument [Member] | Minimum [Member]
Derivative, Forward Exchange Rate	1.2702			1.2702	1.2702
Foreign Exchange Contract [Member] | Casa Berardi [Member] | Designated as Hedging Instrument [Member] | Maximum [Member]
Derivative, Forward Exchange Rate	1.3785			1.3785	1.3785
Silver Contracts [Member]
Derivative, Average Price Risk Option Strike Price (in USD per Ounce) | $ / oz			16.50
Derivative, Nonmonetary Notional Amount, Mass (Ounce) | oz	0		1,100,000
Gold Contracts [Member]
Derivative, Average Price Risk Option Strike Price (in USD per Ounce) | $ / oz			1,650
Derivative, Nonmonetary Notional Amount, Mass (Ounce) | oz	0		12,992
Unsettled Concentrate Sales Contracts [Member]
Derivative, Gain (Loss) on Derivative, Net, Total	$ 2,800	1,700
Forecasted Future Concentrate Contracts [Member]
Derivative, Gain (Loss) on Derivative, Net, Total	500	$ 7,900
Commodity Contract [Member]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral, Total	6,400
Derivative, Fair Value, Obligations Under the Agreements	$ 6,400

Note 8 - Derivative Instrumen_4

Note 8 - Derivative Instruments - Foreign Currency (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current derivatives assets	$ 7,195	$ 3,470
Derivatives assets	6,346	4,558
Foreign Exchange Contract [Member]
Current derivatives assets	5,000	3,500
Derivatives assets	$ 4,200	$ 4,200

Note 8 - Derivative Instrumen_5

Note 8 - Derivative Instruments - Summary of Forward Sales Contracts (Details) oz in Thousands, lb in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021ozlbg$ / oz$ / lb$ / item	Dec. 31, 2020ozlb$ / oz$ / lb
Silver 2021 Settlements for Provisional Sales [Member]
Ounces/pounds under contract (Ounce) | oz	1,492	1,282
Average price per ounce/pound (in USD per Ounce) | $ / oz	25.48	25
Gold 2021 Settlements for Provisional Sales [Member]
Ounces/pounds under contract (Ounce) | oz	5	4
Average price per ounce/pound (in USD per Ounce) | $ / oz	1,736	1,858
Zinc 2021 Settlements for Provisional Sales [Member]
Ounces/pounds under contract (Ounce) | lb	12,070	23,314
Average price per ounce/pound (in USD per Ounce) | $ / lb	1.26	1.19
Lead 2021 Settlements for Provisional Sales [Member]
Ounces/pounds under contract (Ounce) | lb	1,587	4,905
Average price per ounce/pound (in USD per Ounce) | $ / lb	0.89	0.90
Zinc 2021 Settlements for Forecasted Sales [Member]
Ounces/pounds under contract (Ounce) | lb	33,841	41,577
Average price per ounce/pound (in USD per Ounce) | $ / lb	1.20	1.17
Lead 2021 Settlements for Forecasted Sales [Member]
Ounces/pounds under contract (Ounce) | lb	30,479	30,876
Average price per ounce/pound (in USD per Ounce) | $ / lb	0.89	0.88
Zinc 2022 Settlements for Forecasted Sales [Member]
Ounces/pounds under contract (Ounce) | lb	53,407	18,519
Average price per ounce/pound (in USD per Ounce) | $ / lb	1.26	1.28
Lead 2022 Settlements for Forecasted Sales [Member]
Ounces/pounds under contract (Ounce) | g	42,715
Average price per ounce/pound (in USD per Ounce) | $ / item	0.96
Zinc 2023 Settlements for Provisional Sales [Member]
Ounces/pounds under contract (Ounce) | lb	41,171
Average price per ounce/pound (in USD per Ounce) | $ / lb	1.27

Note 8 - Derivative Instrumen_6

Note 8 - Derivative Instruments - Fair Value of Forward and Put Option Contracts (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Contracts in asset position	$ 7,195	$ 3,470
Contracts in liability position	(3,906)	(11,737)
Contracts in asset position	6,346	4,558
Forward and Put Option Contracts [Member] | Current Derivatives Assets [Member]
Contracts in asset position	3,300	200
Contracts in liability position	(1,100)	(200)
Net asset (liability)	2,200	0
Forward and Put Option Contracts [Member] | Noncurrent Derivative Assets [Member]
Net asset (liability)	2,100	400
Contracts in asset position	2,300	500
Contracts in liability position	(200)	(100)
Forward and Put Option Contracts [Member] | Current Derivative Liabilities [Member]
Contracts in asset position	0	100
Contracts in liability position	(3,900)	(11,800)
Net asset (liability)	(3,900)	(11,700)
Forward and Put Option Contracts [Member] | Other Noncurrent Liabilities [Member]
Net asset (liability)	(800)	0
Contracts in asset position	400	0
Contracts in liability position	$ (1,200)	$ 0

Note 9 - Fair Value Measureme_3

Note 9 - Fair Value Measurement (Details Textual) - Senior Notes [Member] $ in Millions	Mar. 31, 2021USD ($)
Notes Payable, Total	$ 468.8
Fair Value, Inputs, Level 1 [Member]
Notes Payable, Fair Value Disclosure	$ 509.7

Note 9 - Fair Value Measureme_4

Note 9 - Fair Value Measurement - Assets and Liabilities Accounted for at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Receivables from provisional concentrate sales	$ 8,475	$ 11,329
Fair Value, Recurring [Member]
Total assets	201,335	186,164
Total liabilities	4,742	11,756
Fair Value, Inputs, Level 1 [Member]
Certificates of deposit and other bank deposits	1,053	1,053
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Money market funds and other bank deposits	139,750	129,830
Equity securities – mining industry	11,717	19,389
Fair Value, Inputs, Level 2 [Member]
Receivables from provisional concentrate sales	35,274	27,864
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Metal forward and put option contracts	4,349	381
Foreign exchange contracts	9,192	7,647
Metal forward and put option contracts	4,742	11,737
Foreign exchange contracts	$ 0	$ 19

Note 10 - Commitments, Contin_2

Note 10 - Commitments, Contingencies and Obligations (Details Textual) - USD ($) $ in Thousands	Oct. 30, 2019	Jul. 31, 2018	Dec. 31, 2014	Aug. 31, 2012	Jun. 30, 2011	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Environmental Remediation Expense						$ 3,709	$ 516
Contractual Obligation, Total						2,100
Finance Lease, Liability, Payment, Due, Total						18,180
Lessee, Operating Lease, Liability, to be Paid, Total						11,691
Performance Obligation Commitments [Member]
Surety Bonds						176,800
Letters of Credit Outstanding, Amount						20,300
Lucky Friday [Member]
Open Purchase Orders						4,000
Casa Berardi [Member]
Open Purchase Orders						700
Greens Creek [Member]
Open Purchase Orders						2,800
Nevada Operations [Member]
Open Purchase Orders						2,700
PRP Lawsuit in Mineral County, Colorado [Member]
Loss Contingency, Damages Sought, Value	$ 5,000
Johnny M Mine Area near San Mateo, New Mexico [Member]
Payment Of Response Costs			$ 1,100	$ 1,100
Estimated Response Costs		$ 9,600				9,000		$ 6,100
Environmental Remediation Expense						$ 9,000
Carpenter Snow Creek Superfund Site, Cascade County, Montana [Member]
Estimated Response Costs					$ 4,500
Estimated Future Response Cost					$ 100,000