XML 114 R94.htm IDEA: XBRL DOCUMENT
v3.21.1

Income Taxes - Liability for Uncertain Tax Positions (Details) - USD ($) $ in Thousands | Jan. 31, 2021 | Jan. 26, 2020
--- | --- | ---
Income Tax Contingency [Line Items] |  |
Total accrued taxes | $ 25,501 | $ 24,130
Noncurrent Deferred Tax Asset [Member] |  |
Income Tax Contingency [Line Items] |  |
Liability for uncertain tax positions - noncurrent | 15,770 | 15,575
Other Liabilities [Member] |  |
Income Tax Contingency [Line Items] |  |
Liability for uncertain tax positions - noncurrent | $ 9,731 | $ 8,555

X
- Definition Liability for uncertain tax positions current and noncurrent. + References No definition available. + Details
Name: | smtc_LiabilityForUncertainTaxPositionsCurrentAndNoncurrent
Namespace Prefix: | smtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_IncomeTaxContingencyLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount recognized for uncertainty in income taxes classified as noncurrent. + 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 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LiabilityForUncertainTaxPositionsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=smtc_NoncurrentdeferredtaxassetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |