Business Acquisition, Maximum Additional Contingent Payment, If Circumstances Met, Share Price

No definition available.

Name:	pcrx_BusinessAcquisitionMaximumAdditionalContingentPaymentIfCircumstancesMetSharePrice
Namespace Prefix:	pcrx_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Business Combination, Covenant Terms, Shares Tendered Combined With Other Shares Owned, Minimum, Percentage

+ References

No definition available.

+ Details

Name:	pcrx_BusinessCombinationCovenantTermsSharesTenderedCombinedWithOtherSharesOwnedMinimumPercentage
Namespace Prefix:	pcrx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Class Of Warrant Or Right, Number Of Rights Issued

+ References

No definition available.

+ Details

Name:	pcrx_ClassOfWarrantOrRightNumberOfRightsIssued
Namespace Prefix:	pcrx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtLongtermAndShorttermCombinedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow associated with the purchase of all investments (debt, security, other) during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585

+ Details

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

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=pcrx_FlexionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUBSEQUENT EVENTS (Details) - Subsequent Event - Flexion $ / shares in Units, $ in Millions	Oct. 22, 2021 USD ($) $ / shares shares	Nov. 18, 2021	Oct. 15, 2021 USD ($)
Subsequent Event [Line Items]
Offer price, per Flexion Share \| $ / shares	$ 8.5
Contingent value right, per Flexion Share \| shares	1
Additional contingent payment, per Flexion Share, share price \| $ / shares	$ 8.00
Payments to acquire Flexion Shares \| $	$ 450.0
Flexion outstanding debt \| $			$ 144.0
Tendered shares as a percent of Flexion Shares		0.50