Revenue From Contracts With Customers - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Revenue From Contracts With Customers [Line Items]
Lease revenue	$ 1,629	$ 1,399
Accounts receivables payment terms	30 days
Interest income on notes receivable	$ 12	$ 6
Revenue remaining performance obligation amount	$ 8,974
Minimum
Revenue From Contracts With Customers [Line Items]
Notes receivable interest rate	5.00%
Maximum
Revenue From Contracts With Customers [Line Items]
Notes receivable interest rate	7.00%

Accounts receivables payment terms.

No definition available.

Name:	lnsr_AccountsReceivablesPaymentTerms
Namespace Prefix:	lnsr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Notes receivable interest rate.

+ References

No definition available.

+ Details

Name:	lnsr_NotesReceivableInterestRate
Namespace Prefix:	lnsr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Revenue from contracts with customers.

+ References

No definition available.

+ Details

Name:	lnsr_RevenueFromContractsWithCustomersLineItems
Namespace Prefix:	lnsr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of interest income on financing receivable from change in present value of expected cash flows attributable to passage of time. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82919204-210446

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 12
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919246-210447

+ Details

Name:	us-gaap_FinancingReceivableChangeInPresentValueInterestIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=124258985&loc=SL77919372-209981

+ Details

Name:	us-gaap_LeaseIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130556-203045

+ Details

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

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: