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Summary of Significant Accounting Policies (Details 1)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Company A [Member]    
Revenue, Major Customer [Line Items]    
Concentration risk percentage 43.00% 34.00%
Company B [Member]    
Revenue, Major Customer [Line Items]    
Concentration risk percentage 27.00% 24.00%
Company C [Member]    
Revenue, Major Customer [Line Items]    
Concentration risk percentage [1] 11.00%
[1] Amount is less than 10%.