v3.26.1
Segment Information and Geographical Data (Geographic Revenue before Reimbursements) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 26, 2026
Jun. 27, 2025
Jun. 26, 2026
Jun. 27, 2025
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenue $ 69,328 $ 78,899 $ 138,125 $ 156,764
United States [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenue 56,213 62,697 112,011 126,708
Europe (U.K., Germany, France, Switzerland and Spain) [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenue 7,311 8,858 15,145 17,213
Other (Australia, Canada, India and Uruguay) [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenue $ 5,804 $ 7,344 $ 10,969 $ 12,843