Basis of Presentation and Significant Accounting Policies - Additional Information (Details) - customer	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Huawei Technologies [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of concentration of credit risk	48.00%	41.00%	49.00%	40.00%
Ciena Corporation [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of concentration of credit risk	15.00%	26.00%	15.00%	24.00%
Company Top Ten Customers [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of concentration of credit risk	91.00%	92.00%	91.00%	91.00%
Number of customers	10	10	10	10
Customer One [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Percentage of concentration of credit risk			45.00%		59.00%
Number of customers			1		1