XML 42 R31.htm IDEA: XBRL DOCUMENT v3.22.2

Investments - Carrying Value and Amortized Cost of Company's Investments Summarized by Major Security Type (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Debt securities, Estimated Fair Value	$ 296,518	$ 373,271
Debt and equity securities, Amortized Cost	297,369	373,475
Debt and equity securities, Unrealized Gains	32	9
Debt and equity securities, Unrealized Losses	(883)	(213)
Debt and equity securities, Estimated Fair Value	296,518	373,271
US Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
Debt securities, Amortized Cost	67,568	140,287
Debt securities, Unrealized Gains	0	0
Debt securities, Unrealized Losses	(92)	(100)
Debt securities, Estimated Fair Value	67,476	140,187
US Government Sponsored Enterprises Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Debt securities, Amortized Cost	49,502	49,512
Debt securities, Unrealized Gains	0	0
Debt securities, Unrealized Losses	(92)	(38)
Debt securities, Estimated Fair Value	49,410	49,474
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Debt securities, Amortized Cost	25,869
Debt securities, Unrealized Gains	0
Debt securities, Unrealized Losses	(66)
Debt securities, Estimated Fair Value	25,803
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Debt securities, Amortized Cost		26,006
Debt securities, Unrealized Gains		0
Debt securities, Unrealized Losses		(22)
Debt securities, Estimated Fair Value		25,984
Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Debt securities, Amortized Cost	154,430	157,670
Debt securities, Unrealized Gains	32	9
Debt securities, Unrealized Losses	(633)	(53)
Debt securities, Estimated Fair Value	$ 153,829	$ 157,626

X

- Definition

Debt securities and equity securities fv ni.

+ References

No definition available.

+ Details

Name:	acad_DebtSecuritiesAndEquitySecuritiesFvNi
Namespace Prefix:	acad_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Debt securities and equity securities fv ni amortized cost.

+ References

No definition available.

+ Details

Name:	acad_DebtSecuritiesAndEquitySecuritiesFvNiAmortizedCost
Namespace Prefix:	acad_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Debt securities and equity securities fv ni unrealized gains.

+ References

No definition available.

+ Details

Name:	acad_DebtSecuritiesAndEquitySecuritiesFvNiUnrealizedGains
Namespace Prefix:	acad_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Debt securities and equity securities fv ni unrealized losses.

+ References

No definition available.

+ Details

Name:	acad_DebtSecuritiesAndEquitySecuritiesFvNiUnrealizedLosses
Namespace Prefix:	acad_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

+ Details

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

X

- Definition

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

+ Details

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

X

- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

+ Details

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

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26626-111562

+ Details

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

X

- 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

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

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
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_DomesticCorporateDebtSecuritiesMember
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: