Note 5. Acquisitions (Detail) - Changes In Earnout Liabilities (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended		12 Months Ended
May 31, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2012 Contingent Earnout Liability Accruals [Member]	Sep. 30, 2012 Contingent Earnout Liability Payments [Member]	Sep. 30, 2012 Contingent Earnout Liability Valuation Adjustment [Member]
Balance at September 30			$ 1,365
Contingent Earnout Liability	142	83		1,458	(437)	(723)
Balance at September 30		$ 1,067	$ 1,365

This element represents the amount of any change, including any differences arising upon settlement, recognized during the reporting period in the value of a liability, arising from an item of contingent consideration, assumed in a business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 4

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e7008-128479

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

-Subparagraph b

-Clause 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration