Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

+ Details

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

- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 35
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

+ Details

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

- Details

Name:	us-gaap_BusinessAcquisitionAxis=lmat_ArtegraftIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=lmat_CardioCelAndVascuCelBiologicPatchesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ContingentConsiderationByTypeAxis=lmat_AuditedCarveOutFinancialStatementsOfTheAcquiredBusinessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ContingentConsiderationByTypeAxis=lmat_ThirdHoldbackMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ContingentConsiderationByTypeAxis=lmat_ExtensionOfProductShelfLifeFrom36MonthsTo60MonthsInTheFirstAnniversaryOfClosingDateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ContingentConsiderationByTypeAxis=lmat_AchievementOfSpecifiedLevelsOfRevenuesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 13 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Oct. 11, 2019
Artegraft Inc [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 17,500
Business Combination, Contingent Consideration, Liability, Total	400
CardioCel and VascuCel Biologic Patches [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		$ 7,800
Business Combination, Contingent Consideration, Liability, Total	2,300		$ 7,500
CardioCel and VascuCel Biologic Patches [Member] \| Audited Carve-Out Financial Statements of the Acquired Business [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		300
CardioCel and VascuCel Biologic Patches [Member] \| Third Holdback [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		2,000
Business Combination, Contingent Consideration, Liability, Total			2,000
CardioCel and VascuCel Biologic Patches [Member] \| Extension of Product Shelf Life from 36 Months to 60 Months in the First Anniversary of Closing Date [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		500
Business Combination, Contingent Consideration, Liability, Total			500
CardioCel and VascuCel Biologic Patches [Member] \| Achievement of Specified Levels of Revenues [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		$ 5,000
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure	$ 0
Fair Value, Inputs, Level 3 [Member] \| CardioCel and VascuCel Biologic Patches [Member]
Business Combination, Contingent Consideration, Liability, Total			$ 2,300