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Note 13 - Debt (Details Textual)
Apr. 01, 2019
Mar. 09, 2016
USD ($)
a
Mar. 09, 2016
MXN
a
Oct. 01, 2017
USD ($)
Dec. 31, 2016
USD ($)
Aug. 31, 2016
USD ($)
Toluca [Member]            
Sale Leaseback Transaction, Amount Due under Financing Arrangement | $       $ 3,008,000    
Toluca [Member] | Sypris Technologies Mexico, S. de R.L. de C.V. [Member]            
Area of Land | a   24 24      
Sale Leaseback Transaction, Net Proceeds, Investing Activities   $ 12,182,000 MXN 215,000,000      
Sale Leaseback Transaction, Term of Lease   10 years 10 years      
Sale Leaseback Transaction, Portion of Real Estate Property Leased Back to Seller | a   9 9      
Promissory Note [Member] | Gill Family Capital Management [Member]            
Subordinated Debt | $       $ 6,500,000 $ 6,500,000 $ 6,500,000
Debt Instrument, Interest Rate, Stated Percentage       8.00%    
Promissory Note [Member] | Gill Family Capital Management [Member] | Five-year Treasury Note Average During Preceding 90-day Period [Member] | Scenario, Forecast [Member]            
Debt Instrument, Basis Spread on Variable Rate 5.00%