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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Sep. 30, 2018
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Commitments and Contingencies Disclosure [Abstract] |  |
Workers' compensation liability | $ 4.0 | $ 2.6

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- Definition Carrying value as of the balance sheet date of obligations and payables pertaining to claims incurred of a workers compensation nature. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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