Subsequent Events - Additional Information (Details Textual)	Apr. 20, 2024 USD ($)	Apr. 03, 2024 USD ($) Member $ / shares shares	Mar. 31, 2024 USD ($)
Subsequent Event [Line Items]
Amount of retention bonuses			$ 311,000
Subsequent Event
Subsequent Event [Line Items]
Declared cash dividend		$ 5,000,000
Amount of retention bonuses	$ 444,000
Subsequent Event | ARCA and Oruka
Subsequent Event [Line Items]
Percentage of ownership interest		97.62%
Subsequent Event | Series B Preferred Stock
Subsequent Event [Line Items]
Minimum percentage of originally issued shares		30.00%
Minimum percentage of originally issued outstanding		30.00%
Subsequent Event | Merger Agreement | Minimum
Subsequent Event [Line Items]
Subscription agreement receipt of proceeds amount		$ 175,000,000
Subsequent Event | Merger Agreement | ARCA and Oruka
Subsequent Event [Line Items]
Payment of other party termination fee		$ 440,000
Subsequent Event | Merger Agreement | Series B Preferred Stock
Subsequent Event [Line Items]
Preferred stock, par value | $ / shares		$ 0.001
Subsequent Event | Seperation Agreement
Subsequent Event [Line Items]
Number of months base salary		12 months
Cash payment		$ 25,000
Subsequent Event | Second Amendment of Certain Retention Bonus Letters | Thomas A. Keuer
Subsequent Event [Line Items]
Increase of retention bonus to each executive	200,000
Subsequent Event | Second Amendment of Certain Retention Bonus Letters | C. Jeffrey Dekker
Subsequent Event [Line Items]
Increase of retention bonus to each executive	200,000
Subsequent Event | Original Terms of Retention Bonus Letter and First Amendment to Retention Bonus Letter | Thomas A. Keuer and C. Jeffrey Dekker
Subsequent Event [Line Items]
Amount of retention bonuses	$ 165,000
Subsequent Event | Oruka Therapeutics Inc | Common Stock and Pre Funded Warrants
Subsequent Event [Line Items]
Aggregate purchase price		$ 275,000,000
Subsequent Event | Oruka Therapeutics Inc | First Merger
Subsequent Event [Line Items]
Excepted number of board members | Member		5
Subsequent Event | ARCA
Subsequent Event [Line Items]
Number of consecutive trading days		5 days
Adjusted exchange ratio		$ 5,000,000
Subsequent Event | ARCA | Common Stock
Subsequent Event [Line Items]
Initially specified percentage for beneficial number of shares		9.99%
Subsequent Event | ARCA | ARCA and Oruka
Subsequent Event [Line Items]
Percentage of noncontrolling ownership interest		2.38%
Subsequent Event | ARCA | First Merger | Series B Preferred Stock | Common Stock
Subsequent Event [Line Items]
Preferred stock convertible shares issuable | shares		1,000