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Net Income (Loss) Per Share | 6 Months Ended
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Jun. 30, 2014
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] | 3. Net Income (Loss) Per Share Basic net income (loss) per share excludes the effect of dilution and is computed by dividing net income (loss) by the weighted-average number of shares outstanding for the period. Diluted net income (loss) per share reflects the potential dilution that could occur if securities or other contracts to issue shares were exercised into shares. In calculating diluted net income (loss) per share, the numerator is adjusted for the change in the fair value of the warrant liability (only if dilutive) and the denominator is increased to include the number of potentially dilutive common shares assumed to be outstanding during the period using the treasury stock method. The following table sets forth the reconciliation of the numerator and denominator used in the computation of basic and diluted net income (loss) per common share for the three and six months ended June 30, 2014 and 2013:
|  | Three Months Ended June 30, |  | Six Months Ended June 30, |
(in thousands, except per share amounts) |  | 2014 |  | 2013 |  | 2014 |  | 2013 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) used for basic earnings per share |  | $ | (842) |  | $ | 5,064 |  | $ | (2,646) |  | $ | 11,065 |
Less change in fair value of warrant liability |  |  | — |  |  | 5,362 |  |  | — |  |  | 2,317 |
Net (loss) income used for diluted earnings per share |  | $ | (842) |  | $ | (298) |  | $ | (2,646) |  | $ | 8,748 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted-average outstanding common shares |  |  | 88,998 |  |  | 82,527 |  |  | 88,964 |  |  | 80,403 |
Effect of dilutive potential common shares resulting from options |  |  | — |  |  | — |  |  | — |  |  | 1,226 |
Effect of dilutive potential common shares resulting from warrants |  |  | — |  |  | 32 |  |  | — |  |  | 4,642 |
Weighted-average shares outstanding—diluted |  |  | 88,998 |  |  | 82,559 |  |  | 88,964 |  |  | 86,271 |
Net income (loss) per common share: |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (0.01) |  | $ | 0.06 |  | $ | (0.03) |  | $ | 0.14 |
Diluted |  | $ | (0.01) |  | $ | 0.00 |  | $ | (0.03) |  | $ | 0.10 |
The table below presents common shares underlying stock options and warrants that are excluded from the calculation of the weighted average number of common shares outstanding used for the calculation of diluted net income (loss) per common share. These are excluded from the calculation due to their anti-dilutive effect for the three and six months ended June 30, 2014 and 2013:
|  | Three Months Ended June 30, |  | Six Months Ended June 30, |
(in thousands) |  | 2014 |  | 2013 |  | 2014 |  | 2013 |
Weighted-average anti-dilutive common shares resulting from options |  |  | 6,485 |  |  | 3,302 |  |  | 7,077 |  |  | 1,175 |
Weighted-average anti-dilutive common shares resulting from warrants |  |  | 4,110 |  |  | 1,334 |  |  | 3,967 |  |  | 23 |
|  |  | 10,595 |  |  | 4,636 |  |  | 11,044 |  |  | 1,198 |

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- Definition The entire disclosure for earnings per share. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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