XML 130 R63.htm IDEA: XBRL DOCUMENT
v3.25.2

Commitments and Contingencies (Details) - USD ($) | Jun. 10, 2025 | Mar. 25, 2024 | Jun. 09, 2025
--- | --- | --- | ---
Chief Executive Officer |  |  |
Loss Contingencies [Line Items] |  |  |
Base salary | $ 633,032 |  | $ 717,229
Non-accountable expense allowance reversal | $ 12,000 |  |
Determination of benefits, termination period | 2 years |  |
Vice President, R&D and Chief Medical Officer |  |  |
Loss Contingencies [Line Items] |  |  |
Base salary | $ 550,000 |  | $ 599,342
Determination of benefits, termination period | 2 years |  |
Senior Vice President Finance and Treasury and Chief Accounting Officer |  |  |
Loss Contingencies [Line Items] |  |  |
Determination of benefits, termination period | 2 years |  |
Senior Vice President, Business Development and Operations and General Counsel |  |  |
Loss Contingencies [Line Items] |  |  |
Base salary | $ 356,000 |  |
Base salary continuation of payment, period | 12 months |  |
Bonus lump sum | 100.00% |  |
COBRA coverage reimbursement period | 12 months |  |
Lingmed Limited |  |  |
Loss Contingencies [Line Items] |  |  |
Litigation settlement, amount awarded to other party |  | $ 500,000 |
Litigation settlement, payment term |  | 30 days |
Litigation settlement, future milestone payments |  | 5.00% |
Litigation settlement, first milestone payment |  | $ 250,000 |

X
- Definition Base Salary Continuation of Payment, Period + References No definition available. + Details
Name: | lsta_BaseSalaryContinuationOfPaymentPeriod
Namespace Prefix: | lsta_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Bonus Lump Sum + References No definition available. + Details
Name: | lsta_BonusLumpSum
Namespace Prefix: | lsta_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition COBRA Coverage Reimbursement Period + References No definition available. + Details
Name: | lsta_COBRACoverageReimbursementPeriod
Namespace Prefix: | lsta_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Compensation Expense, Base Salary + References No definition available. + Details
Name: | lsta_CompensationExpenseBaseSalary
Namespace Prefix: | lsta_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Employment Agreement, Determination Of Benefits, Termination Period + References No definition available. + Details
Name: | lsta_EmploymentAgreementDeterminationOfBenefitsTerminationPeriod
Namespace Prefix: | lsta_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Litigation Settlement, Future Milestone Payments, Percent + References No definition available. + Details
Name: | lsta_LitigationSettlementFutureMilestonePaymentsPercent
Namespace Prefix: | lsta_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Litigation Settlement, Milestone Payment + References No definition available. + Details
Name: | lsta_LitigationSettlementMilestonePayment
Namespace Prefix: | lsta_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Litigation Settlement, Payment Term + References No definition available. + Details
Name: | lsta_LitigationSettlementPaymentTerm
Namespace Prefix: | lsta_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Non-Accountable Expense Allowance Reversal + References No definition available. + Details
Name: | lsta_NonAccountableExpenseAllowanceReversal
Namespace Prefix: | lsta_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-9 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-9 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 720 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483359/720-20-50-1 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 27 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482395/460-10-55-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-9 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-4 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-3 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_TitleOfIndividualAxis=srt_ChiefExecutiveOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=lsta_VicePresidentRDAndChiefMedicalOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=lsta_SeniorVicePresidentFinanceAndTreasuryAndChiefAccountingOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=lsta_SeniorVicePresidentBusinessDevelopmentAndOperationsAndGeneralCounselMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=lsta_LingmedLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |