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Loss per Share of Common Stock (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Basic and Diluted Loss Per Share of Common Stock | The following tables set forth the computation of basic and diluted loss per share of common stock for the years ended December 31, 2017, 2016 and 2015, respectively. We computed basic loss per share for the years ended December 31, 2017, 2016 and 2015, respectively, using the weighted average number of shares outstanding during the periods. Diluted loss per share for the years ended December 31, 2017, 2016 and 2015, reflects additional shares of common stock related to our convertible Senior Common Stock (if the effect would be dilutive), that would have been outstanding if dilutive potential shares of common stock had been issued, as well as an adjustment to net income available to common stockholders as applicable to common stockholders that would result from their assumed issuance (dollars in thousands, except per share amounts).
|  | For the year ended December 31,
|  | 2017 |  | 2016 |  | 2015
Calculation of basic loss per share of common stock: |  |  |  |  |  |
Net loss attributable to common stockholders |  | $ | (4,939 | ) |  | $ | (3,698 | ) |  | $ | (1,505 | )
Denominator for basic weighted average shares of common stock |  | 26,358,237 |  |  | 23,193,962 |  |  | 21,159,597 |
Basic loss per share of common stock |  | $ | (0.19 | ) |  | $ | (0.16 | ) |  | $ | (0.07 | )
Calculation of diluted loss per share of common stock: |  |  |  |  |  |
Net loss attributable to common stockholders |  | $ | (4,939 | ) |  | $ | (3,698 | ) |  | $ | (1,505 | )
Net loss attributable to common stockholders plus assumed conversions (1) |  | $ | (4,939 | ) |  | $ | (3,698 | ) |  | $ | (1,505 | )
Denominator for basic weighted average shares of common stock |  | 26,358,237 |  |  | 23,193,962 |  |  | 21,159,597 |
Effect of convertible Senior Common Stock (1) |  | — |  |  | — |  |  | — |
Denominator for diluted weighted average shares of common stock (1) |  | 26,358,237 |  |  | 23,193,962 |  |  | 21,159,597 |
Diluted loss per share of common stock |  | $ | (0.19 | ) |  | $ | (0.16 | ) |  | $ | (0.07 | )
(1) | We excluded convertible shares of Senior Common Stock of 753,881, 800,116, and 782,957 from the calculation of diluted earnings per share for the years ended December 31, 2017, 2016 and 2015, respectively, because it was anti-dilutive.

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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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