Stock-Based Compensation - Summary of Unrecognized Stock-based Compensation Expense Expected to be Amortized (Details) - Phantom Stock Plan $ in Thousands	Sep. 30, 2021 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Remainder of 2021	$ 1,500
2022	5,606
2023	3,495
2024	469
2025	97
Total unrecognized stock-based compensation expense	$ 11,167

- Definition

Employee service share based compensation non vested awards total compensation cost not yet recognized share based awards other than options future amortization.

+ References

No definition available.

+ Details

Name:	lnsr_EmployeeServiceShareBasedCompensationNonVestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptionsFutureAmortization
Namespace Prefix:	lnsr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Employee service share based compensation non vested awards total compensation cost not yet recognized share based awards other than options future amortization next twelve months.

+ References

No definition available.

+ Details

Name:	lnsr_EmployeeServiceShareBasedCompensationNonVestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptionsFutureAmortizationNextTwelveMonths
Namespace Prefix:	lnsr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Employee service share based compensation non vested awards total compensation cost not yet recognized share based awards other than options future amortization remainder of fiscal year.

+ References

No definition available.

+ Details

Name:	lnsr_EmployeeServiceShareBasedCompensationNonVestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptionsFutureAmortizationRemainderOfFiscalYear
Namespace Prefix:	lnsr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Employee service share based compensation non vested awards total compensation cost not yet recognized share based awards other than options future amortization year four.

+ References

No definition available.

+ Details

Name:	lnsr_EmployeeServiceShareBasedCompensationNonVestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptionsFutureAmortizationYearFour
Namespace Prefix:	lnsr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Employee service share based compensation non vested awards total compensation cost not yet recognized share based awards other than options future amortization year three.

+ References

No definition available.

+ Details

Name:	lnsr_EmployeeServiceShareBasedCompensationNonVestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptionsFutureAmortizationYearThree
Namespace Prefix:	lnsr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Employee service share based compensation non vested awards total compensation cost not yet recognized share based awards other than options future amortization year two.

+ References

No definition available.

+ Details

Name:	lnsr_EmployeeServiceShareBasedCompensationNonVestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptionsFutureAmortizationYearTwo
Namespace Prefix:	lnsr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_PhantomShareUnitsPSUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: