Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v3.10.0.1
Stock-Based Compensation (Details) - $ / shares
6 Months Ended
Jun. 28, 2018
May 17, 2018
Dec. 28, 2017
Class A Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common Stock, Par or Stated Value Per Share $ 0.001   $ 0.001
2017 Employee Stock Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair market value measurement period 6 months    
2017 Employee Stock Purchase Plan | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Purchase price, as a percentage of fair market value 85.00%    
2017 Employee Stock Purchase Plan | Class A Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares of stock authorized under the plan   1,500,000