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Business Combination - Pro Forma Results (unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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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

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