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Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010
Gains included in net income, tax provision | $ 86 | $ 144 | $ 118
Accumulated Other Comprehensive Income (Loss) |  |  |
Gains included in net income, tax provision | $ 86 | $ 144 | $ 118

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- Definition Gains included in net income, tax provision. + References No definition available. + Details
Name: | srdx_AdjustmentToAdditionalPaidInCapitalOtherComprehensiveIncomeReclassificationAdjustmentTax
Namespace Prefix: | srdx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration