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License Agreements - Additional Information (Detail) - USD ($)			1 Months Ended	12 Months Ended
	Dec. 10, 2021	Aug. 31, 2017	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Jan. 31, 2022	Feb. 29, 2020
License Agreements [Line Items]
Research and development expenses				$ 15,480,000	$ 12,020,000
ATAI Kures Inc. [Member] \| License Agreement Terms [Member]
License Agreements [Line Items]
Percentage of the common stock shares outstanding			5.00%
Period of notice for termination of agremeent			90 days
ATAI Kures Inc. [Member] \| License Agreement Terms [Member] \| Regulatory And Sales Based Milestone [Member] \| Initial Indication [Member]
License Agreements [Line Items]
Milestone payment payable			$ 15,500,000
ATAI Kures Inc. [Member] \| License Agreement Terms [Member] \| Regulatory And Sales Based Milestone [Member] \| Second And Subsequent Indication [Member]
License Agreements [Line Items]
Milestone payment payable			7,300,000
ATAI Kures Inc. [Member] \| License Agreement Terms [Member] \| Minimum [Member]
License Agreements [Line Items]
Annual license fee payable			10,000
ATAI Kures Inc. [Member] \| License Agreement Terms [Member] \| Maximum [Member]
License Agreements [Line Items]
Annual license fee payable			100,000
ATAI Kures Inc. [Member] \| License Agreement Terms [Member] \| Stock Purchase Agreement [Member]
License Agreements [Line Items]
Research and development expenses			100,000
Stock shares issued during the period for services value			$ 100,000
Research And Development Services [Member] \| ATAI Kures Inc. [Member] \| Regulatory And Sales Based Milestone [Member]
License Agreements [Line Items]
Paid amount				200,000
Otsuka Agreement [Member]
License Agreements [Line Items]
Revenue recognized upon performance obligation satisfied				19,800,000
Otsuka Agreement [Member] \| Research And Development Services [Member]
License Agreements [Line Items]
Contract with customer liability, revenue recognized				600,000
Accelerate License Agreement [Member]
License Agreements [Line Items]
Performance obligation				100,000
CHIBA License [Member]
License Agreements [Line Items]
Material Payment				0	$ 0
Period of notice for termination of agremeent		90 days
Allergan License Agreement [Member]
License Agreements [Line Items]
Performance obligation							$ 500,000
Material Payment				0
Dalriada License Agreement [Member]
License Agreements [Line Items]
Service fees	$ 12,800,000
Dalriada License Agreement [Member] \| Service, Other [Member]
License Agreements [Line Items]
Service fees				0
Invyxis ESLA [Member]
License Agreements [Line Items]
Upfront deposit						$ 1,100,000
Clinical And Sale Milestones [Member] \| CHIBA License [Member]
License Agreements [Line Items]
Milestone payment payable		$ 1,200,000
Clinical And Sale Milestones [Member] \| CHIBA License [Member] \| License Agreement Terms [Member]
License Agreements [Line Items]
Milestone payment payable		$ 1,000,000.0
Otsuka [Member] \| Otsuka Agreement [Member]
License Agreements [Line Items]
Performance obligation				20,000,000.0
Otsuka [Member] \| Otsuka Agreement [Member] \| Outset Of The Otsuka Agreement [Member]
License Agreements [Line Items]
Performance obligation				20,000,000.0
Otsuka [Member] \| Commercial Milestones [Member] \| Otsuka Agreement [Member]
License Agreements [Line Items]
Milestone payments, receivable				66,000,000.0
Otsuka [Member] \| Development And Regulatory Milestones [Member] \| Otsuka Agreement [Member]
License Agreements [Line Items]
Milestone payments, receivable				35,000,000.0
Psyber [Member] \| Clinical And Sale Milestones [Member] \| Accelerate License Agreement [Member]
License Agreements [Line Items]
Milestone payments, receivable				$ 300,000