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Commitments and Contingencies (Details)
1 Months Ended 6 Months Ended
Jan. 03, 2018
decision
Dec. 21, 2017
decision
Oct. 02, 2017
Jul. 14, 2017
patent
Apr. 19, 2017
patent
Feb. 27, 2017
patent
Sep. 26, 2016
petition
Aug. 26, 2016
petition
defendant
Jul. 01, 2015
patent
Mar. 06, 2015
patent
Dec. 04, 2014
USD ($)
claim
$ / products
Aug. 22, 2014
patent
Jun. 13, 2013
USD ($)
$ / products
Sep. 14, 2010
patent
Jan. 31, 2017
petition
Sep. 30, 2013
patent
Jul. 01, 2018
USD ($)
case
claim
Loss Contingencies [Line Items]                                  
Lease expiration date                                 Dec. 31, 2026
Number of days for non-cancellation of purchase obligations prior to expected shipment date                                 30 days
Non-cancelable purchase commitments with suppliers                                 $ 164,200,000
Liabilities recorded for director and officer indemnification agreements                                 0
Liabilities recorded for customers, distributors, and resellers indemnification agreements                                 $ 0
Continued vesting period after termination without cause (in years)                                 1 year
Liabilities for executive's employment agreements                                 $ 0
Number of existing cases and proceedings that the Company currently believes are liking to have a material adverse effect on its financial position | claim                                 0
The future length the Company currently considered regarding existing cases and proceedings that are likely to have a material adverse effect on it (in months)                                 12 months
Earliest Tax Year | Italy                                  
Loss Contingencies [Line Items]                                  
Year under examination                                 2004
Latest Tax Year | Italy                                  
Loss Contingencies [Line Items]                                  
Year under examination                                 2012
Ericsson v. NETGEAR                                  
Loss Contingencies [Line Items]                                  
Number of patents accused of infringing upon | patent                           8      
Damages assessed against defendants, per unit equivalent | $ / products                         0.15        
Damages assessed against defendants, per patent equivalent | $ / products                         0.05        
Foregone verdict amount                     $ 3,600,000            
Foregone ongoing royalty verdict amount, per unit | $ / products                     0.15            
Number of patents jury found infringed | patent                               3  
Number of patents jury found infringed for which PTAB invalidated all claims asserted against the Company | patent                   3              
Ericsson v. NETGEAR | Infringement of U.S. Patent Number 6,466,568                                  
Loss Contingencies [Line Items]                                  
Number of claims jury found infringed | claim                     2            
Ericsson v. NETGEAR | Infringement of U.S. Patent Number 6,772,215                                  
Loss Contingencies [Line Items]                                  
Number of claims jury found infringed | claim                     2            
Ericsson v. NETGEAR | D-Link                                  
Loss Contingencies [Line Items]                                  
Damages assessed against defendants                         $ 435,000        
Ericsson v. NETGEAR | NETGEAR                                  
Loss Contingencies [Line Items]                                  
Damages assessed against defendants                         3,555,000        
Ericsson v. NETGEAR | Acer Gateway                                  
Loss Contingencies [Line Items]                                  
Damages assessed against defendants                         1,170,000        
Ericsson v. NETGEAR | Dell                                  
Loss Contingencies [Line Items]                                  
Damages assessed against defendants                         1,920,000        
Ericsson v. NETGEAR | Toshiba                                  
Loss Contingencies [Line Items]                                  
Damages assessed against defendants                         2,445,000        
Ericsson v. NETGEAR | Belkin                                  
Loss Contingencies [Line Items]                                  
Damages assessed against defendants                         $ 600,000        
Via Vadis v. NETGEAR                                  
Loss Contingencies [Line Items]                                  
Number of patents accused of infringing upon | patent                       3          
Chrismar Systems vs. NETGEAR                                  
Loss Contingencies [Line Items]                                  
Number of patents accused of infringing upon | patent                 4                
Number of active cases the suing company has | case                                 40
Number of defendants | defendant               3                  
Number of Final Written Decisions | decision 2 4                              
Period post Final Written Decision to seek rehearing                                 30 days
Period post Final Written Decision to file appeal                                 63 days
Chrismar Systems vs. NETGEAR | Juniper                                  
Loss Contingencies [Line Items]                                  
Number of IPR petitions | petition             4 4             4    
Realtime Data vs. NETGEAR                                  
Loss Contingencies [Line Items]                                  
Number of patents accused of infringing upon | patent           4                      
Vivato vs. NETGEAR                                  
Loss Contingencies [Line Items]                                  
Number of patents accused of infringing upon | patent         3                        
Duration of jury trial set by court     5 days                            
Hera Wireless vs. NETGEAR                                  
Loss Contingencies [Line Items]                                  
Number of patents accused of infringing upon | patent       3                          
Chief Executive Officer                                  
Loss Contingencies [Line Items]                                  
Number of weeks for which salary is payable upon termination of employment without cause (in days)                                 365 days
Number of years after change of control to trigger full accelerated vest of unvested portion of stock options (in years)                                 1 year
Chief Operations Officer                                  
Loss Contingencies [Line Items]                                  
Number of weeks for which salary is payable upon termination of employment without cause (in days)                                 273 days
Other Key Executives                                  
Loss Contingencies [Line Items]                                  
Number of weeks for which salary is payable upon termination of employment without cause (in days)                                 182 days
Maximum number of years covered by accelerated vest for other key executives if term without cause is within one year of change in control (in years)                                 2 years
46 to 60 Days                                  
Loss Contingencies [Line Items]                                  
Percentage of cancelable orders                                 50.00%
31 to 45 Days                                  
Loss Contingencies [Line Items]                                  
Percentage of cancelable orders                                 25.00%
Minimum | 46 to 60 Days                                  
Loss Contingencies [Line Items]                                  
Required notice period prior to expected shipment date                                 46 days
Minimum | 31 to 45 Days                                  
Loss Contingencies [Line Items]                                  
Required notice period prior to expected shipment date                                 31 days
Maximum | 46 to 60 Days                                  
Loss Contingencies [Line Items]                                  
Required notice period prior to expected shipment date                                 60 days
Maximum | 31 to 45 Days                                  
Loss Contingencies [Line Items]                                  
Required notice period prior to expected shipment date                                 45 days
Arlo                                  
Loss Contingencies [Line Items]                                  
Lease expiration date                                 Dec. 15, 2028