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Note 1 - Summary of Significant Accounting Policies - Inventories (Details) - USD ($)
$ in Thousands
Sep. 26, 2020
Dec. 28, 2019
Raw materials and purchased parts $ 74,639 $ 69,665
Work in process 47,936 46,591
Finished goods 15,304 14,450
Total inventories $ 137,879 $ 130,706 [1]
[1] Derived from December 28, 2019 audited financial statements