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Note 2. Summary of Significant Accounting Policies (Detail) - Estimated Useful Life of Intangible Assets | 12 Months Ended
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Sep. 30, 2012
Minimum [Member] | Noncompete Agreements [Member] |
Estimated useful life of intangible assets | 3 years
Minimum [Member] | Customer Relationships [Member] |
Estimated useful life of intangible assets | 5 years
Maximum [Member] | Noncompete Agreements [Member] |
Estimated useful life of intangible assets | 6 years
Maximum [Member] | Customer Relationships [Member] |
Estimated useful life of intangible assets | 6 years
Developed And Core Technology [Member] |
Estimated useful life of intangible assets | 3 years
Trademarks And Trade Names [Member] |
Estimated useful life of intangible assets | 10 years

X
- 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. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration