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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 |  |  |

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