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Segment Information - Concentration of credit risk - Account receivable (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024
Segment Reporting Information [Line Items]
Accounts receivable	$ 14,888	$ 14,494
Customer A | Accounts Receivable | Credit Concentration Risk
Segment Reporting Information [Line Items]
Accounts receivable	$ 1,800	$ 3,000
Concentration risk percentage	12.00%	20.00%
Customer D | Accounts Receivable | Credit Concentration Risk
Segment Reporting Information [Line Items]
Accounts receivable	$ 2,000	$ 1,300
Concentration risk percentage	13.00%	9.00%
Customer E | Accounts Receivable | Credit Concentration Risk
Segment Reporting Information [Line Items]
Accounts receivable	$ 1,800	$ 1,900
Concentration risk percentage	12.00%	13.00%
Customer F | Accounts Receivable | Credit Concentration Risk
Segment Reporting Information [Line Items]
Accounts receivable	$ 1,800	$ 900
Concentration risk percentage	12.00%	6.00%

X

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
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X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 42
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-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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