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Item 5. Other Information (Details Textual) - Senior Vice President [Member] | 9 Months Ended
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Sep. 30, 2023 shares
Issuer Rule 10b5-1, Aggregate Available Shares (in shares) | 39,640
Issuer Rule 10b5-1, Arrangement Adoption Date | Aug. 24, 2023
Issuer Rule 10b5-1, Arrangement Termination Date | Aug. 27, 2024

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- Definition The aggregate number of shares available to be issued under issuer rule 10b5-1. + References No definition available. + Details
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Namespace Prefix: | lscc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition The date the arrangement is adopted under issuer rule 10b5-1, in YYYY-MM-DD format. + References No definition available. + Details
Name: | lscc_IssuerRule10b51ArrangementAdoptionDate
Namespace Prefix: | lscc_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition The date the arrangement is terminated under issuer rule 10b5-1, in YYYY-MM-DD format. + References No definition available. + Details
Name: | lscc_IssuerRule10b51ArrangementTerminationDate
Namespace Prefix: | lscc_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_TitleOfIndividualAxis=lscc_SeniorVicePresidentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |