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Item 5. Other Information (Details Textual) - Senior Vice President [Member]	9 Months Ended
	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

X

- Definition

The aggregate number of shares available to be issued under issuer rule 10b5-1.

+ References

No definition available.

+ Details

Name:	lscc_IssuerRule10b51AggregateAvailableShares
Namespace Prefix:	lscc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- 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

X

- 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

X

- Details

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