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Note 1 - Summary of Significant Accounting Policies - Inventories (Details) - USD ($)
$ in Thousands
Sep. 29, 2018
Dec. 30, 2017
Raw materials and purchased parts $ 30,770 $ 27,918
Work in process 24,210 25,130
Finished goods 8,844 9,037
Total inventories $ 63,824 $ 62,085 [1]
[1] Derived from December 30, 2017 audited financial statements