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Loss Per Share (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2017
Loss Per Share 1 | 55,000
Loss Per Share 2 | 83,335
Loss Per Share 3 | 278,165
Loss Per Share 4 | 822,000
Loss Per Share 5 | 708,500
Loss Per Share 6 | 310,500

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