Quarterly report pursuant to Section 13 or 15(d)

Concentrations (Details)

v3.19.1
Concentrations (Details) - Customers
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Total sales [Member]
Concentrations (Textual)
Concentration risk, percentage 74.90% 54.50%
Number of customers 4 3
Total sales [Member] | United States [Member]
Concentrations (Textual)
Concentration risk, percentage 10.00% 10.00%
Total sales [Member] | First customer [Member]
Concentrations (Textual)
Concentration risk, percentage 37.10% 24.00%
Total sales [Member] | Second customer [Member]
Concentrations (Textual)
Concentration risk, percentage 10.80% 19.70%
Total sales [Member] | Third customer
Concentrations (Textual)
Concentration risk, percentage 14.40% 10.80%
Total sales [Member] | Four customer
Concentrations (Textual)
Concentration risk, percentage 12.60%
Accounts Receivable [Member]
Concentrations (Textual)
Concentration risk, percentage 78.60%
Number of customers 2
Accounts Receivable [Member] | First customer [Member]
Concentrations (Textual)
Concentration risk, percentage 61.30%
Accounts Receivable [Member] | Second customer [Member]
Concentrations (Textual)
Concentration risk, percentage 17.30%