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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of major customers | A relatively small number of partners accounts for a significant percentage of our revenue. Revenue from significant partners, which is defined as 10% or more of our total revenue, was as follows:
| December 31,
| 2016 |  | 2015 |  | 2014
Partner A | 41 | % |  | 27 | % |  | 37 | %
Partner B | 14 | % |  | 23 | % |  | 31 | %
Partner C | — |  |  | 18 | % |  | 10 | %
Summary of computation of basic and diluted net income (loss) per share | The following table presents the calculation of weighted average shares used to calculate basic and diluted earnings per share (in thousands):
| Year Ended December 31,
| 2016 |  | 2015 |  | 2014
Weighted average shares outstanding: | 20,831 |  |  | 19,790 |  |  | 20,419 |
Dilutive potential common shares: |  |  |  |  |
Restricted stock | — |  |  | 56 |  |  | 36 |
Stock options | — |  |  | 882 |  |  | 978 |
2019 Convertible Senior Notes | — |  |  | 499 |  |  | — |
Shares used to compute diluted income per share | 20,831 |  |  | 21,228 |  |  | 21,433 |
Potentially dilutive shares excluded from calculation due to anti-dilutive effect | 3,544 |  |  | 3,333 |  |  | 5,104 |

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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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