Customer Concentration (Details) - Customers	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Net Sales [Member]
Customer Concentration (Textual)
Concentration risk, percentage	51.00%	50.50%	47.50%	43.60%
Number of customers	3	3	3	3
Concentration risk, description	The Company had net sales to each of three customers that constituted in excess of 10% of its net sales.	The Company had net sales to each of three customers that constituted in excess of 10% of its net sales.			Two customers constituted in excess of 10% of the Company's gross trade accounts receivable.
Net Sales [Member] | Customer One [Member]
Customer Concentration (Textual)
Concentration risk, percentage	20.40%	26.00%	22.80%	24.30%
Net Sales [Member] | Customer Two [Member]
Customer Concentration (Textual)
Concentration risk, percentage	17.50%	14.30%	13.20%	10.80%
Net Sales [Member] | Customer Three [Member]
Customer Concentration (Textual)
Concentration risk, percentage	13.10%	10.20%	11.50%	8.50%
Trade accounts receivable [Member]
Customer Concentration (Textual)
Concentration risk, percentage			70.40%		41.00%
Number of customers	3		3		2
Concentration risk, description			Three customers constituted in excess of 10% of the Company’s gross trade accounts receivable.
Trade accounts receivable [Member] | Customer One [Member]
Customer Concentration (Textual)
Concentration risk, percentage			28.10%		25.20%
Trade accounts receivable [Member] | Customer Two [Member]
Customer Concentration (Textual)
Concentration risk, percentage			24.70%		15.80%
Trade accounts receivable [Member] | Customer Three [Member]
Customer Concentration (Textual)
Concentration risk, percentage			17.60%