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Cash and Cash Equivalents (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Cash and Cash Equivalents |
Summary of cash and cash equivalents |
|  | December 31, |
|  | 2011 |  | 2012 |
|  | $000 |  | $000 |
Cash |  | 4,555 |  | 4,090 |
Investments with original maturity of less than three months at the time of purchase |  | 19,894 |  | 12,322 |
Total cash and cash equivalents |  | 24,449 |  | 16,412 |

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- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
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