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Summary of Significant Accounting Policies - Concentrations of Credit Risk (Details) | 12 Months Ended
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Sep. 30, 2023 USD ($) customer | Sep. 30, 2022 USD ($)
Product Information [Line Items] |  |
Number of customers | customer | 1 |
Customer A | Customer Concentration Risk | Accounts Receivable |  |
Product Information [Line Items] |  |
Accounts Receivable, Gross | $ | $ 7,400,000 | $ 15,800,000
Concentration risk percentage | 30.00% | 52.00%

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- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481990/310-10-45-2 + Details
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