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v3.23.2

Subsequent Event - Summary of Milestone Payments based on the achievement of certain Development and Sales Milestones (Details) - Subsequent Event [Member] $ in Thousands | Jul. 31, 2023 USD ($)
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Trofinetide [Member] |
Subsequent Event [Line Items] |
Development milestones | $ 0
Total milestone payments | 426,250
NNZ-2591 [Member] |
Subsequent Event [Line Items] |
Development milestones | 15,000
Total milestone payments | 831,250
North America [Member] | First commercial sale milestones [Member] | Trofinetide [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 0
North America [Member] | First commercial sale milestones [Member] | NNZ-2591 [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 40,000
North America [Member] | Sales Milestone [Member] | Trofinetide [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 0
North America [Member] | Sales Milestone [Member] | NNZ-2591 [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 350,000
Europe [Member] | First commercial sale milestones [Member] | Trofinetide [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 45,000
Europe [Member] | First commercial sale milestones [Member] | NNZ-2591 [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 45,000
Europe [Member] | Sales Milestone [Member] | Trofinetide [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 170,000
Europe [Member] | Sales Milestone [Member] | NNZ-2591 [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 170,000
Rest of World [Member] | Sales Milestone [Member] | Trofinetide [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 82,500
Rest of World [Member] | Sales Milestone [Member] | NNZ-2591 [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 82,500
JAPAN | First commercial sale milestones [Member] | Trofinetide [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 18,750
JAPAN | First commercial sale milestones [Member] | NNZ-2591 [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 18,750
JAPAN | Sales Milestone [Member] | Trofinetide [Member] |
Subsequent Event [Line Items] |
Total milestone payments | 110,000
JAPAN | Sales Milestone [Member] | NNZ-2591 [Member] |
Subsequent Event [Line Items] |
Total milestone payments | $ 110,000

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- Definition Development milestones + References No definition available. + Details
Name: | acad_DevelopmentMilestones
Namespace Prefix: | acad_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481674/830-30-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 855 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483399/855-10-50-2 + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=acad_TrofinetideMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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- Details
Name: | us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=acad_Nnz2591Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=srt_NorthAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PlanNameAxis=acad_FirstCommercialSaleMilestonesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PlanNameAxis=acad_SalesMilestoneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=srt_EuropeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=acad_RestOfWorldMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=country_JP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |