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Note 3 - Revenue From Contracts With Customers (Details Textual) $ in Millions | 9 Months Ended
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Sep. 26, 2020 USD ($)
Revenue From Contract With Customer, Processing Of Return Merchandise Authorizations | $ 3.0
Revenue From Contract With Customer, Net Impact From Release Of Accruals Offsetting By Return Merchandise Authorization | $ 0.4

X
- Definition Represents net impact from release of accruals offsetting by return merchandise authorization for revenue from contract with customer. + References No definition available. + Details
Name: | lscc_RevenueFromContractWithCustomerNetImpactFromReleaseOfAccrualsOffsettingByReturnMerchandiseAuthorization
Namespace Prefix: | lscc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents processing of return merchandise authorizations for revenue from contract with customer. + References No definition available. + Details
Name: | lscc_RevenueFromContractWithCustomerProcessingOfReturnMerchandiseAuthorizations
Namespace Prefix: | lscc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration