Business Combination - Narrative (Details) - USD ($) $ in Thousands, shares in Millions		12 Months Ended
	Dec. 08, 2022	Sep. 30, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Borrowings		$ 168,000	$ 17,000
Issuance and fair value adjustment of common stock in business combination		6,539
GRSI
Business Acquisition [Line Items]
Percentage of equity interest acquired	10000.00%
Purchase price	$ 187,997
Borrowings	181,500
Issuance and fair value adjustment of common stock in business combination	6,500
Escrow funds	$ 4,300
Revenue contributed since the acquisition date		107,000
Income from operations contributed since the acquisition date		4,400
Non-cash intangible asset amortization expense		$ 8,200
GRSI | Common Stock
Business Acquisition [Line Items]
Issuance of common stock in business combination (in shares)	0.5