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Business Description, Basis of Presentation and Significant Accounting Policies Schedule of Deferred Revenue, COGS and Gross Margin (Tables) | 12 Months Ended
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Dec. 31, 2014
Schedule of Deferred Revenue, COGS, and Gross Margin [Abstract] |
Schedule of Deferred Revenue and Associated Cost of Goods Sold and Gross Profit [Table Text Block] | The details of deferred revenue and associated cost of goods sold and gross profit are as follows:
| As of December 31,
| 2014 |  | 2013
Deferred revenue | $ | 5,004 |  |  | $ | 4,158 |
Deferred cost of goods sold | 1,698 |  |  | 1,520 |
Deferred gross profit | $ | 3,306 |  |  | $ | 2,638 |

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