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Summary of Significant Accounting Policies (Details 1)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Company A [Member]        
Revenue, Major Customer [Line Items]        
Concentration risk percentage 46.00% 44.00% 44.00% 40.00%
Company B [Member]        
Revenue, Major Customer [Line Items]        
Concentration risk percentage 23.00% 20.00% 26.00% 22.00%
Company C [Member]        
Revenue, Major Customer [Line Items]        
Concentration risk percentage 10.00% 11.00% [1] 11.00%
[1] Amount is less than 10%.