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Fair Value Measurements (Details) (Assets and Liabilities Measured at Fair Value on a Recurring Basis [Member], USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Sep. 30, 2011
--- | --- | ---
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | $ 48,369 | $ 51,559
Cash equivalents [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 5,101 | 8,419
U.S. government and government agency obligations [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 28,854 | 30,603
Mortgage-backed securities [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 2,999 | 3,948
Municipal Bonds [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 3,213 | 3,614
Asset-backed securities [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 598 | 1,288
Corporate Bonds [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 6,886 | 2,497
Other [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 718 | 1,190
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 718 | 1,190
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Cash equivalents [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | U.S. government and government agency obligations [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Mortgage-backed securities [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Municipal Bonds [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Asset-backed securities [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Corporate Bonds [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member] | Other [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 718 | 1,190
Significant Other Observable Inputs (Level 2) [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 47,651 | 50,345
Significant Other Observable Inputs (Level 2) [Member] | Cash equivalents [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 5,101 | 8,419
Significant Other Observable Inputs (Level 2) [Member] | U.S. government and government agency obligations [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 28,854 | 30,603
Significant Other Observable Inputs (Level 2) [Member] | Mortgage-backed securities [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 2,999 | 3,933
Significant Other Observable Inputs (Level 2) [Member] | Municipal Bonds [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 3,213 | 3,614
Significant Other Observable Inputs (Level 2) [Member] | Asset-backed securities [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 598 | 1,279
Significant Other Observable Inputs (Level 2) [Member] | Corporate Bonds [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value | 6,886 | 2,497
Significant Other Observable Inputs (Level 2) [Member] | Other [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |
Significant Unobservable Inputs (Level 3) [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  | 24
Significant Unobservable Inputs (Level 3) [Member] | Cash equivalents [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |
Significant Unobservable Inputs (Level 3) [Member] | U.S. government and government agency obligations [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |
Significant Unobservable Inputs (Level 3) [Member] | Mortgage-backed securities [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  | 15
Significant Unobservable Inputs (Level 3) [Member] | Municipal Bonds [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |
Significant Unobservable Inputs (Level 3) [Member] | Asset-backed securities [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  | 9
Significant Unobservable Inputs (Level 3) [Member] | Corporate Bonds [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |
Significant Unobservable Inputs (Level 3) [Member] | Other [Member] |  |
Schedule of assets and liabilities measured at fair value on a recurring basis |  |
Total assets measured at fair value |  |

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration