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Note 4 - Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 01, 2018
Jul. 02, 2017
Jul. 01, 2018
Jul. 02, 2017
Net revenue $ 22,971 $ 21,249 $ 42,913 $ 39,434
Sypris Technologies [Member]        
Net revenue 15,327 14,059 29,834 26,819
Sypris Technologies [Member] | Transferred at Point in Time [Member]        
Net revenue 15,327   29,834  
Sypris Electronics [Member]        
Net revenue 7,644 $ 7,190 13,079 $ 12,615
Sypris Electronics [Member] | Transferred at Point in Time [Member]        
Net revenue 1,240   2,154  
Sypris Electronics [Member] | Transferred over Time [Member]        
Net revenue $ 6,404   $ 10,925