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Financial Instruments (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Concentration of Revenues 76.40% 76.60%
Customer A [Member]    
Concentration of Revenues 0.40% 23.20%
Customer B [Member]    
Concentration of Revenues 2.70% 22.30%
Customer C [Member]    
Concentration of Revenues 65.80% 19.10%
Customer D [Member]    
Concentration of Revenues 7.50% 12.00%