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v3.25.2

Warrants - March 2020, September 2021, April 2024 Pre-funded Warrants (Details) | 6 Months Ended
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Jun. 30, 2025 shares
March 2020 Pre-funded Warrants |
Warrants |
Warrants exercised | 824,718
Stock issued during period | 809,558
September 2021 Pre-funded Warrants |
Warrants |
Warrants exercised | 591,603
Stock issued during period | 590,424
April 2024 Pre-funded Warrants |
Warrants |
Warrants exercised | 1,523,404
Stock issued during period | 1,521,059

X
- Definition Number of warrants exercised during the period. + References No definition available. + Details
Name: | lptx_ClassOfWarrantOrRightWarrantsExercised
Namespace Prefix: | lptx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares issued as a result of exercise of warrants. + References No definition available. + Details
Name: | lptx_StockIssuedDuringPeriodSharesWarrantsExercised
Namespace Prefix: | lptx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
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 No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=lptx_March2020PreFundedWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=lptx_September2021PreFundedWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=lptx_April2024PreFundedWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |