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Nature of Business and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2017
Accounting Policies [Abstract] |
Estimated Useful Life of Property and Equipment | Depreciation and amortization charges are calculated using the straight-line method over the following estimated useful lives:
| Estimated Useful Life
Data processing equipment and software | 3 years
Office furniture and equipment | 3 to 7 years
Leasehold improvements | Shorter of estimated useful life or lease term
Estimated Useful Life of Definite-Lived Intangible Assets | We amortize our finite-lived intangible assets which result from our acquisitions over the following estimated useful lives:
| Estimated Useful Life
Completed technology | 4 to 10 years
Customer contracts and relationships | 5 to 15 years
Trade names | 3 years

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- Definition Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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