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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2012
Accounting Policies [Abstract] |
Schedule of Calculation of Numerator and Denominator in Earnings Per Share | The following table is a reconciliation of the numerators and denominators in the net income per common share calculations (in thousands, except per common share data):
| Fiscal years ended September 30,
| 2012 |  | 2011 |  | 2010
Numerator: |  |  |  |  |
Net income | $ | 7,615 |  |  | $ | 11,019 |  |  | $ | 8,941 |
Denominator: |  |  |  |  |
Denominator for basic net income per common share — weighted average shares outstanding | 25,743 |  |  | 25,312 |  |  | 24,865 |
Effect of dilutive securities: |  |  |  |  |
Employee stock options and employee stock purchase plan | 403 |  |  | 507 |  |  | 289 |
Denominator for diluted net income per common share — adjusted weighted average shares | 26,146 |  |  | 25,819 |  |  | 25,154 |
Net income per common share, basic | $ | 0.30 |  |  | $ | 0.44 |  |  | $ | 0.36 |
Net income per common share, diluted | $ | 0.29 |  |  | $ | 0.43 |  |  | $ | 0.36 |

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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