Note 1 - Organization and Basis for Presentation (Details Textual)	3 Months Ended
Mar. 31, 2021
Minimum [Member]
Period of Payments Received from Customers (Day)	30 days
Maximum [Member]
Period of Payments Received from Customers (Day)	60 days

Period in which payments are received from customers.

No definition available.

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