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Earnings per Share (Tables) | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The weighted average of potentially dilutive securities excluded from the computation of diluted earnings per share for the three- and six-month periods ending June 30, 2013 and 2012 is shown per the table below.
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, 2013 |  |  | June 30, 2012 |  |  | June 30, 2013 |  |  | June 30, 2012 |
Basic common stock outstanding |  |  | 18,179,570 |  |  |  | 17,636,834 |  |  |  | 18,106,564 |  |  |  | 16,629,420 |
Potentially Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares underlying the conversion of preferred stock to common stock |  |  | 10,610,714 |  |  |  | 10,714,286 |  |  |  | 10,610,714 |  |  |  | 10,714,286 |
Shares underlying the conversion of the convertible senior notes |  |  | 8,749,239 |  |  |  | — |  |  |  | 8,749,239 |  |  |  | — |
Shares underlying warrants to purchase common stock |  |  | 6,262,380 |  |  |  | 6,282,659 |  |  |  | 6,302,668 |  |  |  | 6,282,659 |
Shares underlying stock options to purchase common stock |  |  | 526,813 |  |  |  | 401,793 |  |  |  | 533,977 |  |  |  | 348,682 |
Shares underlying restricted stock units |  |  | 436,275 |  |  |  | 559,381 |  |  |  | 418,898 |  |  |  | 613,139 |
|  |  | 26,585,421 |  |  |  | 17,958,119 |  |  |  | 26,615,496 |  |  |  | 17,958,766 |
Diluted weighted shares outstanding |  |  | 44,764,991 |  |  |  | 35,594,953 |  |  |  | 44,722,060 |  |  |  | 34,588,186 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + 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 (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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