Segment Information - Major customers (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Customer Revenues	$ 15,448	$ 13,105	$ 44,265	$ 42,186
Customer F \| Sales Revenue, Net \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Customer Revenues	$ 2,300	$ 400	$ 3,400	$ 1,000
Concentration risk percentage	15.00%	3.00%	8.00%	2.00%

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details