Note 11 - Profit-sharing Plan (Details Textual) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Contribution, Plan Employers Matching Contribution, Annual Vesting Period	6 years
Deferred Profit Sharing [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 0.8	$ 0.6	$ 0.5

Annual vesting period for employer matches of the employee's percentage contribution matched.

No definition available.

Name:	lmat_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPeriod
Namespace Prefix:	lmat_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration