Warrants - Additional Information (Details)						1 Months Ended		3 Months Ended		6 Months Ended
	Mar. 28, 2024 USD ($) PValue	Mar. 27, 2024 $ / shares shares	Feb. 06, 2024 USD ($) TradingDay $ / shares shares	Oct. 03, 2023 USD ($) PValue TradingDay $ / shares shares	Mar. 30, 2023	Feb. 29, 2024 USD ($) $ / shares shares	Nov. 30, 2023 $ / shares shares	Jun. 30, 2024 USD ($) $ / shares	Mar. 31, 2024 USD ($) shares	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)
Class of Warrant or Right [Line Items]
Sale of stock, transaction date					Mar. 27, 2024
Proceeds from issuance of common stock | $											$ 1,150,000
Derivative asset | $								$ 14		$ 14
Change in fair value of warrant liability | $								(156,000)		$ (1,362,000)	$ 0
Reclassification of public warrants, as amended | $									$ 1,199,000
Description of public warrants right to call										The Company has the right to “call” any portion of a holder’s public warrants by delivering a call notice to the holder within 30 days after Company publicly announces an increase in pepinemab-treated patients relative to placebo-treated patients, with statistical significance having a p-value of less than or equal to 0.05, in the change of the FDG-PET standard uptake value ratio for brain metabolism between baseline and month 12 as assessed by [18F]fluorodeoxyglucose (FDG)-PET in the resting state following administration of 40 mg/kg pepinemab or placebo, as applicable, as described in the protocol for the Company’s SIGNAL-AD Alzheimer’s disease study and the associated Statistical Analysis Plan (the “Positive Data Release”). After delivery of a call notice, the public warrants will continue to be exercisable. Each public warrant will be canceled and no longer exercisable to the extent the holder fails to timely exercise the public warrant for the called portion thereof within 20 trading days following the Company’s issuance of a call notice.
Series A Preferred Stock
Class of Warrant or Right [Line Items]
Derivative asset | $	$ 95,000							$ 95,000		$ 95,000
Securities Purchase Agreement
Class of Warrant or Right [Line Items]
Shares issued, price per share | $ / shares								$ 7.64		$ 7.64
November Warrant Offering
Class of Warrant or Right [Line Items]
Warrants issued									354,693
February 2024 Private Placement
Class of Warrant or Right [Line Items]
Sale of stock, transaction date			Feb. 06, 2024
Warrants issued									354,693
Proceeds from issuance of common stock | $			$ 3,700,000
Public Offering and Private Placement
Class of Warrant or Right [Line Items]
Shares issued, price per share | $ / shares		$ 7.77
Maximum [Member] | Securities Purchase Agreement | Series A Preferred Stock
Class of Warrant or Right [Line Items]
Statistical significance of p-value | PValue	0.05
Common Stock
Class of Warrant or Right [Line Items]
Number of shares sold		159,683
Common Stock | Private Placement
Class of Warrant or Right [Line Items]
Warrants issued		159,683
Common Stock | Public Offering and Private Placement
Class of Warrant or Right [Line Items]
Shares issued, price per share | $ / shares		$ 7.77
Public Warrants
Class of Warrant or Right [Line Items]
Sale of stock, transaction date				Oct. 03, 2023
Warrants expiration period				5 years
Call notice period				30 days
Number of trading days | TradingDay				20
Issuance date fair value | $				$ 3,500,000
Percentage of public warrants issued with holders									83.00%
Change in fair value of warrant liability | $										$ 700,000
Public Warrants | Maximum [Member]
Class of Warrant or Right [Line Items]
Statistical significance of p-value | PValue				0.05
Public Warrants | Common Stock
Class of Warrant or Right [Line Items]
Number of shares sold		193,000		542,857
Warrants issued				542,857
Shares issued, price per share | $ / shares				$ 14
Notice period to change beneficial ownership limitation				61 days
Maximum beneficial ownership limitation				9.99%
Public Warrants | Warrants Reclassified As Equity
Class of Warrant or Right [Line Items]
Warrants issued									572,139
Reclassification of public warrants, as amended | $										1,200,000
Pre Funded Warrants and Public Warrants
Class of Warrant or Right [Line Items]
Shares issued, price per share | $ / shares				$ 13.99
Proceeds from issuance of common stock | $				$ 9,600,000
Pre Funded Warrants and Public Warrants | Common Stock
Class of Warrant or Right [Line Items]
Warrants issued				142,857
Pre-funded Warrants
Class of Warrant or Right [Line Items]
Proceeds from issuance of common stock | $						$ 900,000
Pre-funded Warrants | Common Stock
Class of Warrant or Right [Line Items]
Number of shares sold						90,363
Warrants issued				142,857
Shares issued, price per share | $ / shares						$ 0.0014
Private Placement Warrants
Class of Warrant or Right [Line Items]
Warrants expiration period							5 years
Proceeds from issuance of common stock | $										$ 840,000
Description of warrants right to call										The Company has the right to “call” the exercise of any portion of a holder’s private placement warrants by delivering a call notice to the holder within 30 days, in the case of the November private placement warrants, or 120 days in the case of the February private placement warrants, after the Positive Data Release. After delivery of a call notice, the private placement warrants will continue to be exercisable. Each private placement warrant will be canceled and no longer exercisable to the extent the holder fails to timely exercise the private placement warrant for the called portion thereof within 20 trading days, in the case of the November private placement warrants, or 30 trading days in the case of the February private placement warrants, following the Company’s issuance of a call notice, provided that to the extent the exercise of a called portion of a private placement warrant would cause the holder to hold common stock in excess of a specified beneficial ownership limitation, upon exercise of such portion, as set forth in the private placement warrant, instead of shares being issued, the exercise would result in the modification of the terms of such portion to be consistent with the terms of the pre-funded warrant.
Change in fair value of warrant liability | $										$ 360,000
Reclassification of public warrants, as amended | $										$ 800,000
Private Placement Warrants | November Warrant Offering
Class of Warrant or Right [Line Items]
Call notice period				30 days
Number of trading days | TradingDay			20
Percentage of warrants issued with holders									100.00%
Private Placement Warrants | February 2024 Private Placement
Class of Warrant or Right [Line Items]
Call notice period			120 days
Number of trading days | TradingDay			30
Percentage of warrants issued with holders									97.00%
Private Placement Warrants | Common Stock | November Warrant Offering
Class of Warrant or Right [Line Items]
Number of shares sold							37,694
Shares issued, price per share | $ / shares							$ 1.75
Private Placement Warrants | Common Stock | February 2024 Private Placement
Class of Warrant or Right [Line Items]
Number of shares sold			274,182
Shares issued, price per share | $ / shares			$ 10.15
Common Warrants | February 2024 Private Placement
Class of Warrant or Right [Line Items]
Exercise price of warrants | $ / shares			$ 14
Common Warrants | Common Stock | February 2024 Private Placement
Class of Warrant or Right [Line Items]
Warrants issued			274,182
Common Warrants | Common Stock | Private Placement
Class of Warrant or Right [Line Items]
Warrants issued		193,000
Common and Pre-Funded Warrants | February 2024 Private Placement
Class of Warrant or Right [Line Items]
Warrants issued			90,363
Shares issued, price per share | $ / shares			$ 10.1486
ADDF Warrant
Class of Warrant or Right [Line Items]
Warrant expiration date								Mar. 29, 2029		Mar. 29, 2029
ADDF Warrant | Common Stock
Class of Warrant or Right [Line Items]
Number of shares sold										229,057