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Supporting Financial Information - Accounts Receivable (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Sep. 30, 2023
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Billed receivables | $ 36,343 | $ 38,577
Contract assets | 19,234 | 20,542
Less: Allowance for doubtful accounts | 0 | 0
Accounts Receivable, before Allowance for Credit Loss, Current | $ 55,577 | $ 59,119

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- Definition Amounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 912 -SubTopic 310 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482312/912-310-45-2 + Details
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