XML 55 R37.htm IDEA: XBRL DOCUMENT
v3.21.1

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 |  |

X
- Definition The minimum average realized silver price per ounce that must be met for the silver-price-linked component of dividends to be declared. + References No definition available. + Details
Name: | hl_AverageRealizedSilverPriceMinimumDividendThreshold
Namespace Prefix: | hl_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the average silver price realized during the period. + References No definition available. + Details
Name: | hl_AverageRealizedSilverPricePerOunce
Namespace Prefix: | hl_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum number of shares to be sold under the equity distribution agreement. + References No definition available. + Details
Name: | hl_EquityDistributionAgreementMaximumNumberOfSharesToBeSold
Namespace Prefix: | hl_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents quarterly cash dividends of common stock. + References No definition available. + Details
Name: | hl_QuarterlyDividendsCommonStockCash
Namespace Prefix: | hl_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents minimum annual dividend component for quarterly cash dividends of common stock. + References No definition available. + Details
Name: | hl_QuarterlyDividendsCommonStockCashMinimumAnnualDividendComponent
Namespace Prefix: | hl_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents silver price-linked component of quarterly cash dividends of common stock. + References No definition available. + Details
Name: | hl_QuarterlyDividendsCommonStockCashSilverPricelinkedComponent
Namespace Prefix: | hl_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
Name: | us-gaap_Dividends
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=hl_AtthemarketOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |