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Disaggregation of Revenues, Geographic Sales and Product Sales - Net Sales by Products and Services (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2021
Oct. 01, 2021
Jul. 02, 2021
Apr. 02, 2021
Jan. 01, 2021
Oct. 02, 2020
Jul. 03, 2020
Apr. 03, 2020
Dec. 31, 2021
Jan. 01, 2021
Jan. 03, 2020
Product Information [Line Items]                      
Total other product sales                 $ 17,567 $ 22,053 $ 20,863
Total net sales $ 59,001 $ 58,352 $ 62,367 $ 50,752 $ 45,998 $ 47,081 $ 35,194 $ 35,187 230,472 163,460 150,185
ICLs [Member]                      
Product Information [Line Items]                      
Revenue from contract with customer, excluding assessed tax                 212,905 141,407 129,322
Cataract IOLs [Member]                      
Product Information [Line Items]                      
Total other product sales                 12,519 13,574 15,689
Other surgical products [Member]                      
Product Information [Line Items]                      
Total other product sales                 $ 5,048 $ 8,479 $ 5,174