| Schedule of segment information | 
Long-lived assets primarily include net property, plant and equipment:   
|   |   | Three months ended |   |  
|   |   | October 1, 2016 |   |   | September 26, 2015 |   |  
| Net sales |   |   |   |   |   |   |   |   |  
| Americas |   |   | 21,425 |   |   |   | 23,678 |   |  
| Europe/Africa/ME |   |   | 13,960 |   |   |   | 15,578 |   |  
| Asia/Pacific |   |   | 9,847 |   |   |   | 8,780 |   |  
| Total |   |   | 45,232 |   |   |   | 48,036 |   |    
|   |   | YTD 2016 |   |   | YTD 2015 |   |  
| Net sales |   |   |   |   |   |   |   |   |  
| Americas |   |   | 69,541 |   |   |   | 75,507 |   |  
| Europe/Africa/ME |   |   | 45,440 |   |   |   | 48,493 |   |  
| Asia/Pacific |   |   | 32,088 |   |   |   | 32,438 |   |  
| Total |   |   | 147,069 |   |   |   | 156,438 |   |    
|   |   | October 1, 2016 |   |   | January 2, 2016 |   |  
| Total assets |   |   |   |   |   |   |   |   |  
| Americas |   |   | 188,193 |   |   |   | 168,662 |   |  
| Europe/Africa/ME |   |   | 56,458 |   |   |   | 56,720 |   |  
| Asia/Pacific |   |   | 16,851 |   |   |   | 16,158 |   |  
| Total |   |   | 261,502 |   |   |   | 241,540 |   |    
| Long-lived assets |   |   |   |   |   |   |   |   |  
| Americas |   |   | 71,676 |   |   |   | 72,529 |   |  
| Europe/Africa/ME |   |   | 6,671 |   |   |   | 7,923 |   |  
| Asia/Pacific |   |   | 4,630 |   |   |   | 4,070 |   |  
| Total |   |   | 82,977 |   |   |   | 84,522 |   |    |