Commitments and Contingencies (Details) - Inventory supplies of NEXLETOL and NEXLIZET - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Revenue Interest Purchase Agreement
Initial agreement term		3 years
Renewal period		1 year
Rolling period for minimum purchase order commitments		12 months
Forecast
Revenue Interest Purchase Agreement
Future purchase amounts	$ 19.1

- Definition

Initial term of the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Renewal period of the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	espr_LongTermPurchaseCommitmentRenewalPeriod
Namespace Prefix:	espr_
Data Type:	xbrli:durationItemType
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- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

+ Details

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

- Definition

Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- 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

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Data Type:	xbrli:stringItemType
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Period Type:	duration

- Details

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- Details

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