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Note 2. Summary of Significant Accounting Policies (Detail) - Estimated Useful Life of Intangible Assets	12 Months Ended
	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