Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Deferred tax associated with equity component of convertible debt	$ 20,500	$ 20,450

Deferred Tax Expense Associated to the Equity Component of Convertible Debt

No definition available.

Name:	pcrx_DeferredTaxExpenseAssociatedToTheEquityComponentOfConvertibleDebt
Namespace Prefix:	pcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration