XML 81 R70.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Segment Information - Revenue by Product Line (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 28, 2018 | Oct. 29, 2017 | Oct. 28, 2018 | Oct. 29, 2017
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 173,550,000 | $ 150,304,000 | $ 467,190,000 | $ 447,233,000
Signal Integrity [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | 69,981,000 | 63,921,000 | 204,381,000 | 198,645,000
Protection [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | 53,085,000 | 49,366,000 | 139,875,000 | 136,673,000
Wireless and Sensing [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | 50,484,000 | 43,266,000 | 144,435,000 | 126,641,000
Other: Warrant Shares |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales offset | $ 0 | $ (6,249,000) | $ (21,501,000) | $ (14,726,000)
Net sales [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Concentration risk, percentage | 100.00% | 100.00% | 100.00% | 100.00%
Net sales [Member] | Signal Integrity [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Concentration risk, percentage | 40.00% | 42.00% | 44.00% | 43.00%
Net sales [Member] | Protection [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Concentration risk, percentage | 31.00% | 33.00% | 30.00% | 31.00%
Net sales [Member] | Wireless and Sensing [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Concentration risk, percentage | 29.00% | 29.00% | 31.00% | 29.00%
Net sales [Member] | Other: Warrant Shares |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Concentration risk, percentage | (0.00%) | (4.00%) | (5.00%) | (3.00%)

X
- Definition Allocated share-based compensation expense as a percentage of net revenue + References No definition available. + Details
Name: | smtc_Allocatedsharebasedcompensationexpenseasapercentageofnetrevenue
Namespace Prefix: | smtc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue Offset + References No definition available. + Details
Name: | smtc_RevenueOffset
Namespace Prefix: | smtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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_EntityWideInformationRevenueFromExternalCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ProductOrServiceAxis=smtc_SignalIntegrityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=smtc_ProtectionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=smtc_WirelessandSensingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=smtc_OtherWarrantSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |