Revenue - Revenue by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 65,010	$ 103,171	$ 125,935	$ 200,572
High Speed Products
Disaggregation of Revenue [Line Items]
Total revenue	61,032	92,863	118,305	182,713
Network Products and Solutions
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,978	$ 10,308	$ 7,630	$ 17,859