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Accrued Severance, Severance Assets and Retirement Plans (Tables) | 12 Months Ended
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Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract] |
Breakdown of Company's Severance Liability and Severance Assets |
|  | As of December 31, |
|  | 2016 |  |  | 2015 |
Current severance liability (included in Accrued payroll, payroll taxes and social benefits) |  | $ | 279 |  |  | $ | 41 |
Non-current severance liability |  |  | — |  |  |  | 4,984 |
Total severance liability |  | $ | 279 |  |  | $ | 5,025 |
Current severance assets (included in Other current assets) |  | $ | — |  |  | $ | 51 |
Non-current severance assets |  |  | — |  |  |  | 3,558 |
Total severance assets |  | $ | — |  |  | $ | 3,609 |

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