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:

Note 11 - Stockholders' Equity - Dividend Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Cash dividends declared per common share (in dollars per share)	$ 0.140	$ 0.125	$ 0.420	$ 0.375
Quarterly Dividends 1 [Member]
Payment date			Mar. 23, 2023		Mar. 24, 2022
Cash dividends declared per common share (in dollars per share)			$ 0.140		$ 0.125
Dividend payment	$ 3,099		$ 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)			$ 0.140		$ 0.125
Dividend payment	3,116		$ 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)			$ 0.140		$ 0.125
Dividend payment	$ 3,117		$ 3,117		$ 2,750
Quarterly Dividends 4 [Member]
Payment date					Dec. 01, 2022
Cash dividends declared per common share (in dollars per share)					$ 0.125
Dividend payment					$ 2,750