XML 69 R55.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Acquisitions (Details) - USD ($) shares in Millions |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 20, 2015 | Jan. 30, 2015 | Jul. 01, 2013 | Jan. 02, 2016 | Jan. 03, 2015 | Dec. 28, 2013
Acquisition |  |  |  |  |  |
Payment of earn-out for the first annual period |  |  |  | $ 4,464,000 |  |
Purchase price allocation |  |  |  |  |  |
Goodwill |  |  |  | $ 272,722,000 | $ 228,781,000 | $ 228,781,000
Weighted-Average Amortization Period |  |  |  | 9 years |  |
Customer relationships |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Weighted-Average Amortization Period |  |  |  | 7 years |  |
Trademarks |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Weighted-Average Amortization Period |  |  |  | 7 years |  |
Telegesis |  |  |  |  |  |
Acquisition |  |  |  |  |  |
Cash consideration | $ 19,900,000 |  |  |  |  |
Amount of initial consideration held in escrow by the company as security for breaches of representations and warranties and certain other expressly enumerated matters | 2,900,000 |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets | 7,390,000 |  |  |  |  |
Cash and cash equivalents | 717,000 |  |  |  |  |
Other current assets | 4,545,000 |  |  |  |  |
Goodwill | 9,344,000 |  |  |  |  |
Other non-current assets | 131,000 |  |  |  |  |
Current liabilities | (689,000) |  |  |  |  |
Non-current deferred tax liabilities | (1,508,000) |  |  |  |  |
Total purchase price | 19,930,000 |  |  |  |  |
Acquisition-related costs recorded in selling, general and administrative expenses |  |  |  | $ 500,000 |  |
Telegesis | Core and developed technology |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets | $ 4,980,000 |  |  |  |  |
Weighted-Average Amortization Period | 7 years |  |  |  |  |
Telegesis | Customer relationships |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets | $ 2,000,000 |  |  |  |  |
Weighted-Average Amortization Period | 3 years |  |  |  |  |
Telegesis | Trademarks |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets | $ 400,000 |  |  |  |  |
Weighted-Average Amortization Period | 3 years |  |  |  |  |
Telegesis | In-process research and development |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets | $ 10,000 |  |  |  |  |
Bluegiga |  |  |  |  |  |
Acquisition |  |  |  |  |  |
Cash consideration |  | $ 58,000,000 |  |  |  |
Amount of initial consideration held in escrow by the company as security for breaches of representations and warranties and certain other expressly enumerated matters |  | 9,400,000 |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets |  | 25,450,000 |  |  |  |
Cash and cash equivalents |  | 1,132,000 |  |  |  |
Other current assets |  | 6,156,000 |  |  |  |
Goodwill |  | 34,597,000 |  |  |  |
Other non-current assets |  | 208,000 |  |  |  |
Current liabilities |  | (3,289,000) |  |  |  |
Non-current deferred tax liabilities |  | (3,780,000) |  |  |  |
Long-term debt |  | (2,232,000) |  |  |  |
Other non-current liabilities |  | (220,000) |  |  |  |
Total purchase price |  | $ 58,022,000 |  |  |  |
Acquisition-related costs recorded in selling, general and administrative expenses |  |  |  | 1,200,000 |  |
Discount rate applicable to the cash flows (as a percent) |  | 16.10% |  |  |  |
Bluegiga | Developed technology |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets |  | $ 12,190,000 |  |  |  |
Weighted-Average Amortization Period |  | 8 years |  |  |  |
Bluegiga | Customer relationships |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets |  | $ 6,670,000 |  |  |  |
Weighted-Average Amortization Period |  | 4 years |  |  |  |
Bluegiga | Trademarks |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets |  | $ 880,000 |  |  |  |
Weighted-Average Amortization Period |  | 3 years |  |  |  |
Bluegiga | In-process research and development |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets |  | $ 5,710,000 |  |  |  |
Energy Micro |  |  |  |  |  |
Acquisition |  |  |  |  |  |
Cash consideration |  |  |  | 20,000,000 |  |
Purchase price of acquisition |  |  | $ 140,600,000 |  |  |
Initial consideration |  |  | 107,400,000 |  |  |
Deferred consideration in the form of a promissory note, fair value |  |  | $ 19,200,000 |  |  |
Restricted stock exchanged of promissory note in form of deferred consideration on acquisition |  |  | 0.5 |  |  |
Mandatory period of creditor notice after which the deferred consideration in the form of a promissory note will be exchanged for the entity's restricted stock |  |  | 2 months |  |  |
Earn-Out, fair value |  |  | $ 14,000,000 |  |  |
Additional consideration on acquisition |  |  | $ 33,300,000 | 26,700,000 |  |
Minimum annual revenue growth for additional consideration (as a percent) |  |  | 25.00% |  |  |
Earn out period |  |  | 5 years |  |  |
Maximum annual Earn-Out payment |  |  | $ 6,666,666 |  |  |
Minimum revenue in single fiscal year from Earn-Out products required to make the entire Earn-Out amount payable |  |  | 400,000,000 |  |  |
Amount release for the Holdback |  |  | $ 20,300,000 |  |  |
Percentage of Earn-Out contingent on the continued employment of certain key employees |  |  | 28.76% |  |  |
Period of continued employment of key employees for calculating Earn-out portion following acquisition date |  |  | 3 years |  |  |
Payment of earn-out for the first annual period |  |  |  | 6,300,000 |  |
Earn-out payment representing the Departure Percentage portion and recorded as compensation expense |  |  |  | 1,800,000 |  |
Remaining Earn-out payment representing additional consideration |  |  |  | $ 4,500,000 |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets |  |  | $ 55,400,000 |  |  |
Cash and cash equivalents |  |  | 919,000 |  |  |
Other current assets |  |  | 6,486,000 |  |  |
Goodwill |  |  | 98,515,000 |  |  |
Other non-current assets |  |  | 3,117,000 |  |  |
Current liabilities |  |  | (8,000,000) |  |  |
Non-current deferred tax liabilities |  |  | (6,288,000) |  |  |
Long-term debt |  |  | (8,434,000) |  |  |
Other non-current liabilities |  |  | (1,133,000) |  |  |
Total purchase price |  |  | 140,582,000 |  |  |
Acquisition-related costs recorded in selling, general and administrative expenses |  |  |  |  |  | $ 2,400,000
Discount rate applicable to the cash flows (as a percent) |  |  |  | 13.00% |  |
Energy Micro | Core and developed technology |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets |  |  | $ 29,100,000 |  |  |
Weighted-Average Amortization Period |  |  | 7 years |  |  |
Energy Micro | Customer relationships |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets |  |  | $ 6,400,000 |  |  |
Weighted-Average Amortization Period |  |  | 8 years |  |  |
Energy Micro | Trademarks |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets |  |  | $ 1,300,000 |  |  |
Weighted-Average Amortization Period |  |  | 8 years |  |  |
Energy Micro | In-process research and development |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Intangible assets |  |  | $ 18,600,000 |  |  |

X
- Definition Represents the payment for contingent consideration arrangements recognized in connection with a business acquisition. + References No definition available. + Details
Name: | slab_BusinessAcquisitionContingentConsiderationAmountPaid
Namespace Prefix: | slab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the information pertaining to earn-out payment representing additional consideration. + References No definition available. + Details
Name: | slab_BusinessAcquisitionContingentConsiderationAmountRepresentingAdditionalConsideration
Namespace Prefix: | slab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the information pertaining to earn-out payment representing the departure percentage portion. + References No definition available. + Details
Name: | slab_BusinessAcquisitionContingentConsiderationAmountRepresentingDeparturePercentagePortion
Namespace Prefix: | slab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the earn-out period in which potential additional consideration may be paid. + References No definition available. + Details
Name: | slab_BusinessAcquisitionEarnOutPeriod
Namespace Prefix: | slab_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the continued period of employment, following the acquisition date, of the key employees for calculating the Earn-Out portion. + References No definition available. + Details
Name: | slab_BusinessAcquisitionKeyEmployeesContinuedEmploymentPeriodForCalculatingPortionOfEarnOutFollowingAcquisitionDate
Namespace Prefix: | slab_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum annual revenue growth percentage required for potential additional consideration payment. + References No definition available. + Details
Name: | slab_BusinessAcquisitionPercentageOfMinimumAnnualRevenueGrowthRequiredForAdditionalConsiderationPayment
Namespace Prefix: | slab_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the creditor notice period after which the deferred consideration in the form of a promissory note will be exchanged for the shares of the entity's restricted stock under the business acquisition arrangement in a business combination. + References No definition available. + Details
Name: | slab_BusinessAcquisitionSharesIssuableCreditorNoticePeriod
Namespace Prefix: | slab_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount deposited in escrow related to business combination. + References No definition available. + Details
Name: | slab_BusinessCombinationContingentConsiderationEscrow
Namespace Prefix: | slab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the maximum annual contingent consideration payable under business combinations. + References No definition available. + Details
Name: | slab_BusinessCombinationContingentConsiderationMaximumAnnualPayment
Namespace Prefix: | slab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents minimum revenue in a single fiscal year from Earn-Out products required to make the entire Earn-Out amount payable less any amounts previously paid. + References No definition available. + Details
Name: | slab_BusinessCombinationContingentConsiderationMinimumRevenueInFiscalYearFromEarnOutProductsRequiredForEntireEarnOutToBePayable
Namespace Prefix: | slab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the percentage of Earn-Out contingent on the continued employment of certain key employees. + References No definition available. + Details
Name: | slab_BusinessCombinationContingentConsiderationPercentageContingentOnContinuedEmploymentOfCertainKeyEmployees
Namespace Prefix: | slab_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of initial consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References No definition available. + Details
Name: | slab_BusinessCombinationInitialConsiderationTransferred
Namespace Prefix: | slab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
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_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of other assets expected to be realized or consumed before one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of deferred tax liability attributable to taxable temporary differences due after one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_EscrowDeposit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + 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 (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueInputsDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TechnologyBasedIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_InProcessResearchAndDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_DevelopedTechnologyRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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