Annual report pursuant to Section 13 and 15(d)

Vendor Concentrations (Details)

v3.19.1
Vendor Concentrations (Details) - Suppliers
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Vendor Concentrations (Textual)    
Concentration risk, percentage 56.00% 61.00%
Number of suppliers 2