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Earnings (Loss) Per Share (Tables) | 6 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Diluted earnings per share | Diluted earnings (loss) per share is calculated using the treasury stock method.
|  | Three Months Ended |  | Six Months Ended
|  | March 31, |  | March 31,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Numerator: |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 1,316 |  |  | $ | 979 |  |  | $ | (1,535 | ) |  | $ | 1,303 |
Denominator: |  |  |  |  |  |  |  |
Denominator for basic net income per share - weighted-average outstanding shares |  | 11,889 |  |  | 11,249 |  |  | 11,863 |  |  | 11,225 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Stock options and restricted stock |  | 997 |  |  | 1,496 |  |  | — |  |  | 1,488 |
Denominator for diluted net income per share - weighted-average outstanding shares |  | 12,886 |  |  | 12,745 |  |  | 11,863 |  |  | 12,713 |
Net income (loss) per share - basic |  | $ | 0.11 |  |  | $ | 0.09 |  |  | $ | (0.13 | ) |  | $ | 0.12 |
Net income (loss) per share-diluted |  | $ | 0.10 |  |  | $ | 0.08 |  |  | $ | (0.13 | ) |  | $ | 0.10 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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