XML 123 R107.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Segment Information - Long-lived Assets by Region (Details) - USD ($) $ in Thousands | Jan. 28, 2018 | Jan. 29, 2017
--- | --- | ---
Geographic Information And Concentration Of Risk [Line Items] |  |
Long-lived assets | $ 124,606 | $ 108,910
United States |  |
Geographic Information And Concentration Of Risk [Line Items] |  |
Long-lived assets | 48,289 | 50,747
Rest of North America [Member] |  |
Geographic Information And Concentration Of Risk [Line Items] |  |
Long-lived assets | 34,941 | 30,435
Europe |  |
Geographic Information And Concentration Of Risk [Line Items] |  |
Long-lived assets | 9,752 | 8,821
Asia and All Others |  |
Geographic Information And Concentration Of Risk [Line Items] |  |
Long-lived assets | $ 31,624 | $ 18,907

X
- Definition Geographic Information And Concentration Of Risk [Line Items] + References No definition available. + Details
Name: | smtc_GeographicInformationAndConcentrationOfRiskLineItems
Namespace Prefix: | smtc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 + Details
Name: | us-gaap_NoncurrentAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=smtc_RestofNorthAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=us-gaap_EuropeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=smtc_AsiaandAllOthersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |