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Net (Loss) Income Per Common Share - Calculation of Diluted Net (Loss) Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Mar. 31, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Numerator for basic and diluted net (loss) income per share: |  |  |  |  |  |
Net (loss) income | $ (3,919) | $ (1,299) |  | $ (71,901) | $ 12,643 | $ 3,070
Preferred deemed dividend |  |  | $ (9,455) |  | (9,455) |
Series B preferred stock dividends | (4,500) |  |  | (13,248) |  |
Net (loss) income attributable to common shareholders | $ (8,419) | $ (1,299) |  | $ (85,149) | $ 3,188 |
Denominator for diluted net (loss) income per share: |  |  |  |  |  |
Weighted-average shares outstanding | 206,168,035 | 202,343,245 |  | 204,307,431 | 202,163,250 |
Weighted-average unvested restricted shares outstanding | (4,197,396) | (1,343,764) |  | (2,636,314) | (1,336,982) |
Effect of dilutive potential shares |  |  |  |  | 37,045,988 |
Denominator for diluted net (loss) income per share: | 201,970,639 | 200,999,481 |  | 201,671,117 | 237,872,256 |
Diluted net (loss) income per share attributable to common shareholders | $ (0.04) | $ (0.01) |  | $ (0.42) | $ 0.01 |

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- Definition Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256 + Details
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