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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2020
Summary of Significant Accounting Policies |
Schedule of Computation of Basic and Diluted Earnings Per Share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended |  | Six Months Ended |
​ | ​ | June 30, |  | June 30, |
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019 |
​ | ​ | (In thousands, except per share data) |
Numerator: |  | ​ |  |  | ​ |  | ​ | ​ |  |  | ​ |  | ​
Net income (loss) | ​ | $ | (4,911) | ​ | $ | 4,734 | ​ | $ | (3,231) | ​ | $ | 6,104 | ​
Less: Income (loss) allocated to unvested participating securities | ​ |  | (104) | ​ |  | 88 | ​ |  | (68) | ​ |  | 114 | ​
Net income (loss) available to common stockholders | ​ | $ | (4,807) | ​ | $ | 4,646 | ​ | $ | (3,163) | ​ | $ | 5,990 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Denominator for basic earnings (loss) per share — weighted average shares | ​ |  | 5,868 | ​ |  | 5,844 | ​ |  | 5,867 | ​ |  | 5,843 | ​
Effect of dilutive securities: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Common stock equivalents | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​
Denominator for diluted earnings (loss) per share — adjusted weighted-average shares and assumed conversions | ​ |  | 5,868 | ​ |  | 5,844 | ​ |  | 5,867 | ​ |  | 5,843 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings (loss) per share: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Basic | ​ | $ | (.82) | ​ | $ | .80 | ​ | $ | (.54) | ​ | $ | 1.03 | ​
Diluted | ​ | $ | (.82) | ​ | $ | .80 | ​ | $ | (.54) | ​ | $ | 1.03 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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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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