Significant Customer and Geographic Information Significant Customer and Geographic Information (Details)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Revenue [Member] | Customer Concentration Risk [Member] | Arris Corporation [Member]
Concentration Risk [Line Items]
Concentration risk percentage	24.00%	29.00%
Net Revenue [Member] | Customer Concentration Risk [Member] | Cisco [Member]
Concentration Risk [Line Items]
Concentration risk percentage	18.00%	14.00%
Net Revenue [Member] | Customer Concentration Risk [Member] | WNC Corporation
Concentration Risk [Line Items]
Concentration risk percentage	14.00%
Net Revenue [Member] | Geographic Concentration Risk [Member] | China [Member]
Concentration Risk [Line Items]
Concentration risk percentage	81.00%	71.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | WNC Corporation
Concentration Risk [Line Items]
Concentration risk percentage	19.00%	16.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Petragon Corporation [Member]
Concentration Risk [Line Items]
Concentration risk percentage	16.00%	17.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Sernet Technologies Corporation
Concentration Risk [Line Items]
Concentration risk percentage	13.00%	14.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | MTI Jupiter Technologies
Concentration Risk [Line Items]
Concentration risk percentage		13.00%