Note 10 - Stockholders' Equity - Dividend Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash dividends declared per common share (in dollars per share)	$ 0.56	$ 0.5	$ 0.44
Quarterly Dividends 1 [Member]
Payment Date	Mar. 23, 2023	Mar. 24, 2022
Cash dividends declared per common share (in dollars per share)	$ 0.14	$ 0.125
Dividend Payment	$ 3,099	$ 2,743
Quarterly Dividends 2 [Member]
Payment Date	Jun. 01, 2023	Jun. 02, 2022
Cash dividends declared per common share (in dollars per share)	$ 0.14	$ 0.125
Dividend Payment	$ 3,116	$ 2,745
Quarterly Dividends 3 [Member]
Payment Date	Aug. 31, 2023	Sep. 08, 2022
Cash dividends declared per common share (in dollars per share)	$ 0.14	$ 0.125
Dividend Payment	$ 3,117	$ 2,750
Quarterly Dividends 4 [Member]
Payment Date	Nov. 30, 2023	Dec. 01, 2022
Cash dividends declared per common share (in dollars per share)	$ 0.14	$ 0.125
Dividend Payment	$ 3,117	$ 2,750

Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the declared dividend will be paid, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482913/230-10-50-3

+ Details

Name:	us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_DividendsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DividendsAxis=lmat_QuarterlyDividends1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=lmat_QuarterlyDividends2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=lmat_QuarterlyDividends3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=lmat_QuarterlyDividends4Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: