XML 55 R41.htm IDEA: XBRL DOCUMENT v3.8.0.1
Restructuring Costs - Narrative (Details)
ft² in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2018
USD ($)
Apr. 01, 2017
USD ($)
Dec. 30, 2017
USD ($)
ft²
Employee
Restructuring Cost and Reserve [Line Items]      
Restructuring costs $ 770 $ 0  
Employee Severance [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs (3)    
Other Restructuring [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 210    
Restructuring Plan 2017 [Member]      
Restructuring Cost and Reserve [Line Items]      
Manufacturing facility square footage (in sqft) | ft²     160
Expected restructuring costs 1,900    
Restructuring costs 770    
Expected remaining restructuring costs 900    
Restructuring Plan 2017 [Member] | Employee Severance [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs     $ 203
Restructuring Plan 2017 [Member] | Relocation Of Machinery And Equipment And Administrative Offices [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 563    
Restructuring Plan 2017 [Member] | Employee Retention, Facility Closing, And Other Closure Costs [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 210    
Restructuring Plan 2017 [Member] | Machinery And Equipment Relocation [Member]      
Restructuring Cost and Reserve [Line Items]      
Expected remaining restructuring costs 750    
Restructuring Plan 2017 [Member] | Other Restructuring [Member]      
Restructuring Cost and Reserve [Line Items]      
Expected remaining restructuring costs $ 150    
Restructuring Plan 2017 [Member] | United States [Member]      
Restructuring Cost and Reserve [Line Items]      
Number of positions eliminated related to restructuring | Employee     4
Restructuring Plan 2017 [Member] | Sweden [Member]      
Restructuring Cost and Reserve [Line Items]      
Number of positions eliminated related to restructuring | Employee     6