Summary of Significant Accounting Policies and Other Information - Schedules of Concentration of Risk, by Risk Factor (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Purchases | Supplier Concentration Risk | Supplier A
Concentration Risk [Line Items]
Concentration risk, percentage	16.00%	16.00%
Purchases | Supplier Concentration Risk | Supplier B
Concentration Risk [Line Items]
Concentration risk, percentage		15.00%
Purchases | Supplier Concentration Risk | Supplier C
Concentration Risk [Line Items]
Concentration risk, percentage	12.00%
Customer A | Net sales | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	17.00%	20.00%
Customer A | Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	19.00%		25.00%
Customer B | Net sales | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage		11.00%
Customer B | Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage			15.00%