EXCHANGE TRANSACTION - Narrative (Details) - USD ($)		3 Months Ended	9 Months Ended	12 Months Ended
	May 01, 2023	Jul. 31, 2023	Apr. 30, 2023	Jul. 31, 2023	Jul. 31, 2022	Jun. 06, 2023
Related Party Transaction [Line Items]
Common stock, par value (in usd per share)		$ 0.01	$ 0.01	$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)		0		0	0
Equity ownership, excluding consolidated entity and equity method investee, percentage						84.00%
Ownership percentage, noncontrolling interest, threshold percentage	16.00%
Ownership percentage, prior approval of equity securities, threshold percentage			49.60%
Other gains, net		$ 5,242,000	$ 4,471,000		$ 782,000
SPLP
Related Party Transaction [Line Items]
Measurement period adjustments, operating lease, right-of-use asset	$ 350,000
Deferred debt issuance cost, writeoff	43,400
Measurement period adjustments, convertible notes payable	1,420,000
Measurement period adjustments, other liabilities, current	(9,435,000)
Measurement period adjustments, other liabilities, noncurrent	242,000
Deferred income tax liabilities, net	800,000
Measurement period adjustments, non-current pension liability	(500,000)
Investments	$ 202,733,000
Aerojet Share
Related Party Transaction [Line Items]
Proceeds from exchange transaction				$ 207,800,000
Other gains, net		5,100,000
Aerojet common stock proceeds receivable		$ 154,500,000		$ 154,500,000	$ 0
Series E Preferred Stock
Related Party Transaction [Line Items]
Preferred stock, convertible, shares issuable (in shares)						19,800,000
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)	3,600,000
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