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EXCHANGE TRANSACTION - Additional Information (Details) - $ / shares
Jan. 31, 2024
Jul. 31, 2023
Jun. 06, 2023
May 01, 2023
Apr. 30, 2023
Feb. 28, 2019
Related Party Transaction [Line Items]            
Common stock, par value (in usd per share) $ 0.01 $ 0.01        
Preferred stock, shares issued (in shares) 0 0        
Equity ownership, excluding consolidated entity and equity method investee, percentage       85.00%    
Ownership percentage, noncontrolling interest, threshold percentage       15.00%    
Ownership percentage, prior approval of equity securities, threshold percentage         49.60%  
SPHG Holdings | Convertible note investment            
Related Party Transaction [Line Items]            
Debt instrument, stated interest rate       7.50%   7.50%
Common Stock            
Related Party Transaction [Line Items]            
Common stock, par value (in usd per share)     $ 0.01      
Exchange Transaction Agreement | Steel Partners | Aerojet Share | Exchanging Parties            
Related Party Transaction [Line Items]            
Common stock, shares exchanged (in shares)       3,597,744    
Common stock, par value (in usd per share)       $ 0.10    
Exchange Transaction Agreement | Steel Partners | Series E Preferred Stock            
Related Party Transaction [Line Items]            
Preferred stock, shares issued (in shares)       3,500,000