Business and summary of significant accounting policies - Narrative (Details) - USD ($) |
12 Months Ended | ||||
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Jul. 01, 2019 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2017 |
Oct. 01, 2018 |
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Property and Equipment | |||||
Retained earnings | $ 794,739,000 | $ 633,281,000 | $ 666,210,000 | ||
Goodwill, impairment loss | $ 0 | ||||
Impairment of long-lived assets held-for-use | $ 0 | $ 0 | |||
Accounting Standards Update 2014-09 | |||||
Property and Equipment | |||||
Retained earnings | $ 32,900,000 | ||||
Buildings | Maximum | |||||
Property and Equipment | |||||
Estimated useful lives | 39 years | ||||
Office furniture and equipment. | Maximum | |||||
Property and Equipment | |||||
Estimated useful lives | 7 years | ||||
Software development costs. | Minimum | |||||
Property and Equipment | |||||
Estimated useful lives | 3 years | ||||
Software development costs. | Maximum | |||||
Property and Equipment | |||||
Estimated useful lives | 8 years | ||||
U.S. Health and Human Services | |||||
Property and Equipment | |||||
Impairment loss on contract costs | $ 3,700,000 |
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- Definition Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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. No definition available.
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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