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Commitments and Contingencies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Loss Contingencies [Line Items] |  |  |
Percent of royalties paid must equal the dollar linked amount of the grants received | 100.00%silc_PercentOfRoyaltiesPaidMustEqualDollarLinkedAmountOfGrantsReceived |  |
Total commitment in respect of royalty-bearing participations | $ 2,960us-gaap_RoyaltyGuaranteesCommitmentsAmount | $ 2,960us-gaap_RoyaltyGuaranteesCommitmentsAmount |
Rental expenses under the lease agreements | 1,243us-gaap_LeaseAndRentalExpense | 837us-gaap_LeaseAndRentalExpense | 676us-gaap_LeaseAndRentalExpense
Line of credit | $ 154us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity |  |
Minimum [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Royalty rates | 2.00%silc_RoyaltyRates / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Maximum [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Royalty rates | 5.00%silc_RoyaltyRates / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Silicom Research and Development [Member] | Minimum [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Royalty rates | 2.00%silc_RoyaltyRates / us-gaap_RangeAxis = us-gaap_MinimumMember / silc_ResearchAndDevelopmentAxis = silc_SilicomResearchAndDevelopmentMember |  |
Silicom Research and Development [Member] | Maximum [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Royalty rates | 3.50%silc_RoyaltyRates / us-gaap_RangeAxis = us-gaap_MaximumMember / silc_ResearchAndDevelopmentAxis = silc_SilicomResearchAndDevelopmentMember |  |
July 1, 1997 - January 31, 2000 Project [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Royalty rates | 4.00%silc_RoyaltyRates / silc_ResearchAndDevelopmentAxis = silc_July11997January312000ProjectMember |  |

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- Definition Percent of royalties paid which must equal the dollar linked amount of the grants received + References No definition available. + Details
Name: | silc_PercentOfRoyaltiesPaidMustEqualDollarLinkedAmountOfGrantsReceived
Namespace Prefix: | silc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Royalty Rates + References No definition available. + Details
Name: | silc_RoyaltyRates
Namespace Prefix: | silc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount the entity has committed to make for future royalty guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 440 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473578&loc=d3e63223-108013 + Details
Name: | us-gaap_RoyaltyGuaranteesCommitmentsAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | silc_ResearchAndDevelopmentAxis=silc_July11997January312000ProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | silc_ResearchAndDevelopmentAxis=silc_SilicomResearchAndDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |