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Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2016
Quarterly Financial Data [Abstract] |
Quarterly Financial Data |
2016 |  | Q1 |  | Q2 |  | Q3 |  | Q4 |  | Total
Total revenue |  | $ | 21,576 |  |  | $ | 17,194 |  |  | $ | 16,181 |  |  | $ | 16,703 |  |  | $ | 71,654 |
Operating income |  | 3,767 |  |  | 1,873 |  |  | 1,823 |  |  | 967 |  |  | 8,430 |
Net income |  | 2,541 |  |  | 1,259 |  |  | 1,509 |  |  | 1,160 |  |  | 6,469 |
Net income per share - Basic |  | 0.20 |  |  | 0.10 |  |  | 0.12 |  |  | 0.09 |  |  | 0.51 |
Net income per share - Diluted |  | 0.20 |  |  | 0.10 |  |  | 0.12 |  |  | 0.09 |  |  | 0.50 |
2015 |  | Q1 |  | Q2 |  | Q3 |  | Q4 |  | Total
Total revenue |  | $ | 24,741 |  |  | $ | 24,230 |  |  | $ | 21,193 |  |  | $ | 25,755 |  |  | $ | 95,919 |
Operating income |  | 5,787 |  |  | 919 |  |  | 3,798 |  |  | 4,643 |  |  | 15,147 |
Net income |  | 3,694 |  |  | 614 |  |  | 2,562 |  |  | 3,277 |  |  | 10,147 |
Net income per share - Basic |  | 0.30 |  |  | 0.05 |  |  | 0.20 |  |  | 0.26 |  |  | 0.81 |
Net income per share - Diluted |  | 0.29 |  |  | 0.05 |  |  | 0.20 |  |  | 0.26 |  |  | 0.79 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=68076893&loc=d3e1280-108306 + Details
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