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Related Party Transactions (Details Textual) - Enovation Controls [Member] - USD ($)
$ in Thousands
6 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Dec. 29, 2018
Related Party Transaction [Line Items]      
Due from entities $ 90   $ 296
Due to entities 326   $ 631
Inventory Transactions [Member]      
Related Party Transaction [Line Items]      
Total sales to entities 712 $ 1,525  
Total purchases from entities/related party $ 2,694 $ 1,751