Annual report pursuant to Section 13 and 15(d)

Business Combination Business Combination - G.hn (Details)

v3.8.0.1
Business Combination Business Combination - G.hn (Details) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 04, 2017
Jul. 01, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]          
Goodwill     $ 237,992 $ 76,015 $ 49,779
G.hn business of Marvell [Member]          
Business Acquisition [Line Items]          
Business Acquisition, Effective Date of Acquisition Apr. 04, 2017        
Finite-lived Intangible Assets Acquired $ 12,600        
Average useful life 4 years 8 months 12 days        
Inventory $ 2,084        
Total identifiable net assets 18,675        
Business Combination, Purchase price 21,000        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets 147        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property and Equipment 3,277        
Identifiable intangible assets 12,600        
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets 875        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets 28        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable (1)        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Expenses (234)        
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accrued Compensation (2)        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other (99)        
Business Acquisition, Goodwill 2,325        
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Fair Value Mark Up On Inventory 1,246        
Wireless Infrastructure Backhaul Business of Broadcom Corporation [Member]          
Business Acquisition [Line Items]          
Business Acquisition, Effective Date of Acquisition   Jul. 01, 2016      
Developed Technology Rights [Member] | G.hn business of Marvell [Member]          
Business Acquisition [Line Items]          
Finite-lived Intangible Assets Acquired $ 7,100        
Average useful life 7 years        
Customer-Related Intangible Assets [Member] | G.hn business of Marvell [Member]          
Business Acquisition [Line Items]          
Finite-lived Intangible Assets Acquired $ 4,800        
Average useful life 1 year 9 months 18 days        
Backlog [Member] | G.hn business of Marvell [Member]          
Business Acquisition [Line Items]          
Finite-lived Intangible Assets Acquired $ 500        
Average useful life 9 months        
Noncompete Agreements [Member] | G.hn business of Marvell [Member]          
Business Acquisition [Line Items]          
Finite-lived Intangible Assets Acquired $ 200        
Average useful life 3 years        
Cost of Sales [Member] | G.hn business of Marvell [Member]          
Business Acquisition [Line Items]          
Business Combination, Amortization of Inventory Step-Up     $ 1,200