XML 49 R39.htm IDEA: XBRL DOCUMENT v3.23.3

Fair Value Measurements - Fair Value Measurements of Cash Equivalents, Available-For-Sale Investment Securities and Equity Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure	$ 291,635	$ 395,597
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Financial liabilities, fair value disclosure	1,114	898
Money market fund
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure	43,908	72,578
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure	85,998	95,703
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market fund
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure	43,908	72,578
Significant Other Observable Inputs (Level 2)
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure	205,637	299,894
Significant Unobservable Inputs (Level 3)
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Financial liabilities, fair value disclosure	1,114	898
U.S. Treasury notes
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure	42,090	15,945
U.S. Treasury notes | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure	42,090	15,945
Equity securities
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure		7,180
Equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure		7,180
US Government Sponsored Enterprises Debt Securities [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure	205,637	94,803
US Government Sponsored Enterprises Debt Securities [Member] | Significant Other Observable Inputs (Level 2)
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure	205,637	94,803
Municipal bonds
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure		20,775
Municipal bonds | Significant Other Observable Inputs (Level 2)
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure		20,775
Commercial paper
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure		184,316
Commercial paper | Significant Other Observable Inputs (Level 2)
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, fair value disclosure		184,316
Cash awards | Cash
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Financial liabilities, fair value disclosure	1,114	898
Cash awards | Significant Unobservable Inputs (Level 3) | Cash
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Financial liabilities, fair value disclosure	$ 1,114	$ 898

X

- References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

+ References

No definition available.

+ Details

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

X

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_InvestmentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryNotesSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MunicipalBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=acad_CashAwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_CashMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: