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Fair Value Measurements - Summary of Changes in Fair Value of Level 3 Financial Instruments (Details) - Level 3    
$ in Thousands
12 Months Ended
Sep. 30, 2023
USD ($)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration [Roll Forward]  
Beginning balance $ 543
Changes in the fair value of contingent performance-based payments (374)
Performance-based payments made (54)
Ending balance $ 115