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Marketable Securities (Tables) | 9 Months Ended
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Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract] |
Schedule of Marketable Securities |
| September 30, 2015 |  | December 31, 2014
| Cost |  | Unrealized Gain (Loss) |  | Fair Value |  | Cost |  | Unrealized Gain (Loss) |  | Fair Value
U.S. government securities | $ | 39 |  |  | $ | — |  |  | $ | 39 |  |  | $ | 38 |  |  | $ | — |  |  | $ | 38 |
Corporate securities | 41 |  |  |  |  |  | 41 |  |  | 36 |  |  |  |  |  | 36 |
Certificates of deposit | 17 |  |  |  |  |  | 17 |  |  | 23 |  |  |  |  |  | 23 |
Other | 60 |  |  |  |  |  | 60 |  |  | 67 |  |  | 5 |  |  | 72 |
Total marketable securities | $ | 157 |  |  | $ | — |  |  | $ | 157 |  |  | $ | 164 |  |  | $ | 5 |  |  | $ | 169 |

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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