Business combinations and disposals - Schedule of the Valuation of the Intangible Assets Acquired (Details) - Ascend Management Innovations LLC - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Feb. 29, 2016 |
Sep. 30, 2018 |
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| Components of intangible assets | ||
| Fair value | $ 22,300 | |
| Customer relationships | ||
| Components of intangible assets | ||
| Useful life | 19 years | |
| Fair value | 20,400 | |
| Technology-Based Intangible Assets | ||
| Components of intangible assets | ||
| Useful life | 8 years | |
| Fair value | 1,700 | |
| Trade Names | ||
| Components of intangible assets | ||
| Useful life | 1 year | |
| Fair value | $ 200 |
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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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 Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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