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Revenue - Narrative (Details) - USD ($)	9 Months Ended		12 Months Ended
Revenue - Narrative (Details) - USD ($)	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Accounts receivable		$ 20,197,000		$ 16,515,000
Impairment loss on contract assets	$ 0		$ 0
Revenue from Contract with Customer \| Customer Concentration Risk \| Transferred over Time
Disaggregation of Revenue [Line Items]
Concentration risk	39.00%	47.00%