Sales to Major Customers (Details) $ in Millions  | 
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| 
 Sep. 26, 2020  
USD ($) 
 | 
Sep. 28, 2019  | 
 Sep. 26, 2020  
USD ($)  
customer 
 | 
 Sep. 28, 2019  
customer 
 | 
|
| Segment Reporting, Asset Reconciling Item | ||||
| Number of major customers | customer | 2 | 2 | ||
| Sales Revenue, Net | Customer Concentration Risk | Major Customer One | ||||
| Segment Reporting, Asset Reconciling Item | ||||
| Percent of consolidated revenue | 6.00% | 12.00% | 12.00% | 13.00% | 
| Sales Revenue, Net | Customer Concentration Risk | Major Customer Two | ||||
| Segment Reporting, Asset Reconciling Item | ||||
| Percent of consolidated revenue | 10.00% | 14.00% | 9.00% | 14.00% | 
| Sales Revenue, Net | Customer Concentration Risk | Two Major Customers | ||||
| Segment Reporting, Asset Reconciling Item | ||||
| Accounts receivable from major customers | $ | $ 12.5 | $ 12.5 | ||
| X | ||||||||||
- References No definition available. 
  | 
| X | ||||||||||
- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
  | 
| X | ||||||||||
- Details 
  | 
| X | ||||||||||
- Details 
  | 
| X | ||||||||||
- Details 
  | 
| X | ||||||||||
- Details 
  | 
| X | ||||||||||
- Details 
  |