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Significant Accounting Policies (Other Current Assets) (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
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Summary of other current assets |  |
Prepaid expenses | $ 1,087 | $ 1,177
Other receivables | 475 | 731
Total current assets | $ 1,562 | $ 1,908

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