Concentrations - Concentration Risk Percentage (Details) - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts Receivable | Verizon
Concentration Risk [Line Items]
Concentration risk, percentage	5.00%	50.00%
Accounts Receivable | Best Buy
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	15.00%
Accounts Receivable | Superior
Concentration Risk [Line Items]
Concentration risk, percentage	24.00%	1.00%
Net Sales | Verizon
Concentration Risk [Line Items]
Concentration risk, percentage	17.00%	1.00%	0.00%
Net Sales | Best Buy
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	10.00%	9.00%
Net Sales | Superior
Concentration Risk [Line Items]
Concentration risk, percentage	2.00%	23.00%	30.00%