XML 78 R62.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Fair Value Measurements - Financial Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Jan. 28, 2018 | Jan. 29, 2017
--- | --- | ---
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Available-for-sale securities | $ 1,960 | $ 1,425
Cash equivalents | Level 1 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 16,945
Recurring |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Derivative financial instruments | 0 | 326
Total financial assets | 1,960 | 18,696
Total financial liabilities | 21,668 | 1,242
Recurring | Level 1 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Derivative financial instruments | 0 | 0
Total financial assets | 0 | 16,945
Total financial liabilities | 0 | 0
Recurring | Level 2 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Derivative financial instruments | 0 | 326
Total financial assets | 0 | 326
Total financial liabilities | 0 | 0
Recurring | Level 3 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Derivative financial instruments | 0 | 0
Total financial assets | 1,960 | 1,425
Total financial liabilities | 21,668 | 1,242
Recurring | Cash equivalents |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 16,945
Recurring | Cash equivalents | Level 1 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 16,945
Recurring | Cash equivalents | Level 2 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Recurring | Cash equivalents | Level 3 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Recurring | Convertible debt |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Available-for-sale securities | 1,960 | 1,425
Recurring | Convertible debt | Level 1 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Recurring | Convertible debt | Level 2 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Recurring | Convertible debt | Level 3 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Available-for-sale securities | 1,960 | 1,425
AptoVision | Recurring |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Earn-out liability | 21,000 | 0
AptoVision | Recurring | Level 1 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Earn-out liability | 0 | 0
AptoVision | Recurring | Level 2 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Earn-out liability | 0 | 0
AptoVision | Recurring | Level 3 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Earn-out liability | 21,000 | 0
Cycleo [Member] | Recurring |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Earn-out liability | 668 | 1,242
Cycleo [Member] | Recurring | Level 1 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Earn-out liability | 0 | 0
Cycleo [Member] | Recurring | Level 2 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Earn-out liability | 0 | 0
Cycleo [Member] | Recurring | Level 3 |  |
Fair Value, Assets Measured On A Recurring Basis [Line Items] |  |
Earn-out liability | $ 668 | $ 1,242

X
- Definition Earn-out Liability, Fair Value + References No definition available. + Details
Name: | smtc_EarnoutLiabilityFairValue
Namespace Prefix: | smtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair Value, Assets Measured On A Recurring Basis [Line Items] + References No definition available. + Details
Name: | smtc_FairValueAssetsMeasuredOnRecurringBasisLineItems
Namespace Prefix: | smtc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13495-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226008-175313 + Details
Name: | us-gaap_DerivativeAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
Name: | us-gaap_FinancialLiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_CashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_ConvertibleDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=smtc_AptoVisionTechnologiesInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=smtc_CycleoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |