v3.25.4

Note 13 - Employee Benefit Plans (Details Textual) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 03, 2026 | Dec. 28, 2024 | Dec. 30, 2023
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 2.7 | $ 2.8 | $ 3.1
Labor And Related Expense, Incentive Compensation | $ 16.6 | $ 1.6 | $ 15.0

X
- Definition Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit. + References No definition available. + Details
Name: | lscc_LaborAndRelatedExpenseIncentiveCompensation
Namespace Prefix: | lscc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration