XML 46 R36.htm IDEA: XBRL DOCUMENT
v3.20.2

Common stock - Public Offering of Common Stock (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 25, 2020 USD ($) shares | Jun. 22, 2020 $ / shares shares | Jul. 11, 2019 USD ($) $ / shares shares | Jul. 10, 2019 USD ($) shares | Feb. 05, 2019 $ / shares shares | Sep. 07, 2018 USD ($) | Sep. 30, 2020 shares | Mar. 31, 2019 USD ($) | Sep. 30, 2020 USD ($) item shares | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) shares
Common stock issued |  |  |  |  | 7,557,142 |  |  |  |  |  |
Price per share (in dollars per share) | $ / shares |  |  |  |  | $ 1.75 |  |  |  |  |  |
Proceeds from the issuance of common stock | $ |  |  |  |  |  |  |  | $ 12,122 |  |  |
Proceeds From Issuance Of Common Stock Net Of Issuance Costs | $ |  |  |  |  |  |  |  |  |  | $ 999 |
Number of Vote on Common Shares | item |  |  |  |  |  |  |  |  | 1 |  |
Dividends, Common Stock | $ |  |  |  |  |  |  |  |  | $ 0 |  |
June 2020 Warrants |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  | $ 0.001 |  |  |  |  |  |  |  |  |
Exercise price of warrant | $ / shares |  | $ 0.001 |  |  |  |  |  |  |  |  |
Warrant to purchase shares of common stock |  | 2,250,000 |  |  |  |  |  |  |  |  |
February 2019 [Member] |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  |  |  |  | 1.95 |  |  |  |  |  |
Exercise price of warrant | $ / shares |  |  |  |  | $ 1.95 |  |  |  |  |  |
Common Stock | June 2020 Warrants |  |  |  |  |  |  |  |  |  |  |
Common stock issued |  | 20,250,000 |  |  |  |  |  |  |  |  |
Issue price | $ / shares |  | $ 2.00 |  |  |  |  |  |  |  |  |
Net proceeds from issuance of common stock | $ | $ 48,276 |  |  |  |  |  |  |  |  |  |
Distribution Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Common stock issued |  |  |  |  |  |  |  |  | 0 |  | 1,033,147
Commons Stock Value Maximum Right To Sell | $ |  |  |  |  |  | $ 30,000 |  |  |  |  |
Proceeds From Issuance Of Common Stock From Atm Sales | $ |  |  |  |  |  |  |  |  |  |  | $ 1,923
Lincoln Park Purchase Agreements [Member] |  |  |  |  |  |  |  |  |  |  |
Common stock issued |  |  | 571,429 |  |  |  | 0 |  | 0 |  |
Price per share (in dollars per share) | $ / shares |  |  | $ 1.75 |  |  |  |  |  |  |  |
Commons Stock Value Maximum Right To Sell | $ |  |  |  | $ 20,000 |  |  |  |  |  |  |
Stock Issued During Period, Shares, Issued for Services |  |  |  | 330,000 |  |  |  |  |  |  |
Proceeds From Issuance Of Common Stock Net Of Issuance Costs | $ |  |  | $ 1,000 | $ 0 |  |  |  |  |  |  |
Underwriters' exercise |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  | 985,714 |  |  |  |  |  |
Underwriters' exercise | Common Stock | June 2020 Warrants |  |  |  |  |  |  |  |  |  |  |
Common stock issued | 3,375,000 |  |  |  |  |  |  |  |  |  |
Common Stock | June 2020 Warrants |  |  |  |  |  |  |  |  |  |  |
Common stock issued |  | 20,250,000 |  |  |  |  |  |  |  |  |

X
- Definition The amount of common stock set to agreement + References No definition available. + Details
Name: | lptx_CommonsStockValueMaximumRightToSell
Namespace Prefix: | lptx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The net cash proceed from issuance of common stock. + References No definition available. + Details
Name: | lptx_NetProceedsFromIssuanceOfCommonStock
Namespace Prefix: | lptx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the number of votes that each common share is entitled to. + References No definition available. + Details
Name: | lptx_NumberOfVoteOnCommonShares
Namespace Prefix: | lptx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition It represents amount issuance of common stock from atm sales + References No definition available. + Details
Name: | lptx_ProceedsFromIssuanceOfCommonStockFromAtmSales
Namespace Prefix: | lptx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition it represents proceeds received from issuance of common stock + References No definition available. + Details
Name: | lptx_ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts
Namespace Prefix: | lptx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
Name: | us-gaap_DividendsCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
Name: | us-gaap_SharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
Name: | us-gaap_SharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders. + References No definition available. + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=lptx_WarrantsJune2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=lptx_February2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=lptx_DistributionAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=lptx_LincolnParkPurchaseAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |