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Subsequent Event (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 28, 2019
Jun. 29, 2018
Jun. 28, 2019
Jun. 29, 2018
Dec. 31, 2019
Jul. 09, 2019
Jul. 01, 2019
Subsequent Event [Line Items]              
Total Net Revenue [1] $ 84,865 $ 99,160 $ 164,971 $ 189,287      
License and Maintenance [Member] | Comcast [Member] | Subsequent Event [Member]              
Subsequent Event [Line Items]              
Enterprise license term           4 years  
Total Net Revenue         $ 50,000    
Plan | License and Maintenance [Member] | Comcast [Member] | Subsequent Event [Member]              
Subsequent Event [Line Items]              
Committed software license fees from Comcast enterprise license agreement             $ 175,000
[1] Revenue is attributed to countries based on the location of the customer.