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Note 5 - Exit and Disposal Activities (Details Textual) - Transition of Production from the Broadway Plant [Member] - USD ($)
3 Months Ended 12 Months Ended
Apr. 02, 2017
Dec. 31, 2016
Dec. 31, 2016
Restructuring and Related Cost, Incurred Cost $ 998,000   $ 645,000
Restructuring and Related Cost, Incurred Cost, Per Share $ 0.05   $ 0.03
Restructuring and Related Cost, Expected Cost Remaining $ 2,511,000    
Impairment of Long-Lived Assets to be Disposed of   $ 188,000  
Sypris Electronics [Member]      
Restructuring and Related Cost, Expected Cost Remaining 2,511,000    
Employee Severance [Member]      
Restructuring and Related Cost, Incurred Cost 627,000   $ 427,000
Restructuring and Related Cost, Expected Cost Remaining $ 368,000