Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended								12 Months Ended
	Nov. 02, 2021	Jun. 30, 2022	Aug. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2010
Class of Stock [Line Items]
Issuance of common stock in connection with asset acquisition										$ 0	$ 0	$ 44,280
Net proceeds from sale of common stock										$ 8,199	18,162	80,996
Options vesting period										4 years
Aggregate intrinsic value of stock options exercised										$ 1,700	8,000	$ 55,500
Cash received from options exercised										$ 3,700	$ 12,900
Weighted average per share fair value of options granted										$ 13.66	$ 24.07	$ 24.16
Unrecognized compensation costs										$ 63,900	$ 66,000
Weighted average period cost expected to be recognized										2 years 8 months 12 days	2 years 3 months 18 days
Weighted average remaining contractual term, Outstanding										5 years 8 months 12 days
Terms of award										PSUs for which the number of shares issuable at the end of performance period can reach up to 200% of the shares approved in the award based on the achievement of certain pre-defined Acadia-specific performance criteria and continued employment through the vesting period
Share price of common stock										$ 15.92
Issuance of common stock pursuant to employee stock purchase plan										$ 4,494	$ 5,312	$ 7,162
Potential payout	$ 15,100									11,800
Estimated Liability										900	600
Fair value of awards	$ 4,400									1,800	5,600
Compensation cost related to the awards										$ 300	600
Stock Options | Equity Incentive Plan 2010
Class of Stock [Line Items]
Exercise price of Options as percentage of fair market value													100.00%
Options maximum expiration term													10 years
Options vesting period													4 years
Number of common stock authorized for issuance										32,635,412
Common stock available for grants										12,108,840
Common stock reserved for issuance under stock purchase plan		6,000,000			8,300,000	6,700,000	5,500,000	3,000,000	5,000,000
Stock Options | Equity Incentive Plan 2004
Class of Stock [Line Items]
Exercise price of Options as percentage of fair market value										100.00%
Options vesting period										4 years
Number of periods additional number of shares could be added to shares authorized for issuance										10 years
PSU
Class of Stock [Line Items]
Unrecognized compensation costs										$ 12,700	$ 11,500
Weighted average period cost expected to be recognized											2 years 3 months 18 days
Weighted average remaining contractual term, Outstanding										3 years	3 months 18 days
Granted										986,739	918,434
Aggregate Intrinsic Value, Outstanding										$ 32,700	$ 29,800
Outstanding shares										2,055,574	1,276,936
Restricted Stock Units
Class of Stock [Line Items]
Unrecognized compensation costs										$ 44,600	$ 39,800
Weighted average period cost expected to be recognized										2 years 8 months 12 days
Employee Stock Purchase Plan
Class of Stock [Line Items]
Number of common stock authorized for issuance										5,525,000
Common stock reserved for issuance under stock purchase plan				3,000,000	600,000			400,000
Common stock remained available for issuance pursuant to the Purchase Plan										2,479,620
Eligible employees percentage of earnings withheld to purchase shares under purchase plan										15.00%
Purchase price of common stock as percentage of market value										85.00%
Issuance of common stock pursuant to employee stock purchase plan										330,525	296,850	377,963
Average per share price of stock issued under purchase plan										$ 13.60	$ 17.89	$ 18.94
Weighted average per share fair value of purchase rights granted										$ 13.91	$ 23.97	$ 22.47
Issuance of common stock pursuant to employee stock purchase plan										$ 4,500	$ 5,300	$ 7,200
Cersci Therapeutics
Class of Stock [Line Items]
Issuance of common stock in connection with asset acquisition (in shares)			1,200,000
Issuance of common stock in connection with asset acquisition			$ 44,300