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Net Income (Loss) Per Share (Tables) | 6 Months Ended
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Jun. 30, 2012
Net Income (Loss) Per Share [Abstract] |
Summaries of weighted average number of shares outstanding |
|  | Three Months ended |  |  | Six Months ended |
|  | June 30 |  |  | June 30 |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Weighted average number of shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock |  |  | 20,026,354 |  |  |  | 19,840,116 |  |  |  | 20,008,358 |  |  |  | 19,806,034 |
Common stock equivalents-stock options, grants |  |  | 61,278 |  |  |  | 64,628 |  |  |  | 75,372 |  |  |  | 48,495 |
Diluted shares outstanding |  |  | 20,087,632 |  |  |  | 19,904,744 |  |  |  | 20,083,730 |  |  |  | 19,854,529 |
For the three months ended June 30, 2011 diluted net loss per share is calculated based on the weighted average number of shares of common stock outstanding and not diluted shares outstanding because of the antidilutive impact of common stock equivalents.

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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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