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Earnings (loss) and Dividends per Share (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Number of Shares Outstanding for Calculation of Earnings (Loss) Per Share | The computational components of basic and diluted earnings (loss) per share for the three-month and nine-month periods ended September 30, 2018 and 2017 are below.
|  | For the Three Months Ended September 30, 2018 |
|  | Numerator (Loss) |  |  | Denominator (Shares) |  |  | Per Share Amount |
Basic net loss and loss per share |  | $ | (12,915 | ) |  |  | 34,779 |  |  | $ | (0.37 | )
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Common stock equivalents arising from stock options, restricted stock awards, and employee stock purchase plan |  |  |  |  |  |  | — |  |  |  |  |
Diluted loss and loss per share |  | $ | (12,915 | ) |  |  | 34,779 |  |  | $ | (0.37 | )
|  | For the Three Months Ended September 30, 2017 |
|  | Numerator (Income) |  |  | Denominator (Shares) |  |  | Per Share Amount |
Basic net income and earnings per share |  | $ | 3,036 |  |  |  | 34,519 |  |  | $ | 0.09 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Common stock equivalents arising from stock options, restricted stock awards, and employee stock purchase plan |  |  |  |  |  |  | 103 |  |  |  |  |
Diluted earnings and earnings per share |  | $ | 3,036 |  |  |  | 34,622 |  |  | $ | 0.09 |
|  | For the Nine Months Ended September 30, 2018 |
|  | Numerator (Loss) |  |  | Denominator (Shares) |  |  | Per Share Amount |
Basic net loss and loss per share |  | $ | (8,053 | ) |  |  | 34,681 |  |  | $ | (0.23 | )
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Common stock equivalents arising from stock options, restricted stock awards, and employee stock purchase plan |  |  |  |  |  |  | — |  |  |  |  |
Diluted loss and loss per share |  | $ | (8,053 | ) |  |  | 34,681 |  |  | $ | (0.23 | )
|  | For the Nine Months Ended September 30, 2017 |
|  | Numerator (Income) |  |  | Denominator (Shares) |  |  | Per Share Amount |
Basic net income and earnings per share |  | $ | 8,560 |  |  |  | 34,404 |  |  | $ | 0.25 |
Effect of dilutive securities and notes: |  |  |  |  |  |  |  |  |  |  |  |
Common stock equivalents arising from stock options, restricted stock awards, and employee stock purchase plan |  |  |  |  |  |  | 261 |  |  |  |  |
Diluted earnings and earnings per share |  | $ | 8,560 |  |  |  | 34,665 |  |  | $ | 0.25 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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