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Contractual Agreements (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Contract Research And Development [Member]
Schedule of Contractual Agreements [Line Items]
Other Research and Development Expense	$ 1,200,000	$ 887,000	$ 4,000,000	$ 2,500,000
Abbott Products, Inc. [Member] | Collaborative Arrangement [Member]
Schedule of Contractual Agreements [Line Items]
Collaborative Arrangement, Royalties, Maximum Amount			$ 1,000,000
Collaborative Arrangement, Royalties, Percentage of Reduction			50.00%
Collaborative Arrangement, Royalties, Percentage of Net Sales			1.00%

X

- Definition

This element represents the maximum amount of royalties under collaborative arrangements.

+ References

No definition available.

+ Details

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Namespace Prefix:	lpcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

This element represents the percentage on net sales of royalties under collaborative arrangements.

+ References

No definition available.

+ Details

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Namespace Prefix:	lpcn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This element represents the percentage of reduction of royalties under collaborative arrangements, If generic versions of any such product are introduced.

+ References

No definition available.

+ Details

Name:	lpcn_CollaborativeArrangementRoyaltiesPercentageOfReduction
Namespace Prefix:	lpcn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	lpcn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of other research and development expense.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 730
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_IncomeStatementLocationAxis=lpcn_ContractResearchAndDevelopmentMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=lpcn_AbbottProductsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=us-gaap_CollaborativeArrangementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: