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Summary of Significant Accounting Policies - Concentrations of Credit Risk (Details) $ in Millions	12 Months Ended
	Sep. 30, 2022 USD ($) customer	Sep. 30, 2021 USD ($)
Number of customers | customer	1
Customer A | Customer Concentration Risk | Sales Revenue, Net
Concentration risk percentage	19.00%	7.00%
Customer A | Customer Concentration Risk | Accounts Receivable
Accounts Receivable, Gross	$ 15.8	$ 16.2
Concentration risk percentage	52.00%	62.00%
Customer one | Customer Concentration Risk | Accounts Receivable
Accounts Receivable, Gross	$ 15.8	$ 16.2
Concentration risk percentage	52.00%	62.00%

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

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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.

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