Business Combination - Pro Forma Results (unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Basic (in shares)	13,704	12,830
Diluted (in shares)	14,431	14,179
GRSI
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	$ 402,958	$ 507,251
Net income	$ 2,054	$ 18,912
Basic (in shares)	13,704	12,830
Diluted (in shares)	14,431	14,179
Basic earnings per share (in dollars per share)	$ 0.15	$ 1.47
Diluted earnings per share (in dollars per share)	$ 0.14	$ 1.33