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