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Network
036 - Disclosure - Note 4 - Income Taxes (Detail) - Summary of Differences Between U.S. Federal Statutory Rate and Company's Effective Tax Rate
(http://addvantagetech.com/role/SummaryofDifferencesBetweenUSFederalStatutoryRateandCompanysEffectiveTaxRateTable)
TableStatement [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000874292 (http://www.sec.gov/CIK)
Scenario [Axis]Scenario, Unspecified [Domain]
Statement [Line Items]Period [Axis]
2011-10-01 - 2012-09-30
2010-10-01 - 2011-09-30
2009-10-01 - 2010-09-30
Statutory tax rate
.340  
.340  
.340  
State income taxes, net of U.S. federal tax benefit
.035  
.046  
.040  
Charges without tax benefit
.014  
.007  
.005  
Tax credits and other exclusions
(.009) 
.007  
(.005) 
Company’s effective tax rate
.380  
 
.400  
 
.380