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Note 13 - Debt (Details Textual)
12 Months Ended
Apr. 01, 2019
Mar. 09, 2016
USD ($)
a
Mar. 09, 2016
MXN ($)
a
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Mar. 31, 2019
Feb. 28, 2019
USD ($)
Jan. 31, 2018
USD ($)
Interest Costs Capitalized       $ 0 $ 0      
Interest Paid, Excluding Capitalized Interest, Operating Activities       526,000 526,000      
Proceeds from Sale of Property, Plant, and Equipment, Total       1,858,000 $ 1,380,000      
Finance Lease, Liability, Total       3,035,000        
Production Equipment Installed at Sypris Electronics Facility [Member]                
Lessee, Finance Lease, Term of Contract               3 years
Finance Lease, Liability, Total       384,000       $ 1,277,000
Machinery at Sypris Technologies Facility [Member]                
Lessee, Finance Lease, Term of Contract             5 years  
Finance Lease, Liability, Total       230,000     $ 269,000  
Toluca Property [Member]                
Area of Land | a   24 24          
Proceeds from Sale of Property, Plant, and Equipment, Total   $ 12,182,000 $ 215,000,000          
Lessee, Finance Lease, Term of Contract   10 years 10 years          
Sale Leaseback Transaction, Portion of Real Estate Property Leased Back to Seller | a   9 9          
Finance Lease, Liability, Total       $ 2,421,000        
Promissory Note [Member] | Gill Family Capital Management [Member]                
Debt, Weighted Average Interest Rate       8.00% 8.00%      
Subordinated Debt, Ending Balance       $ 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]                
Debt Instrument, Basis Spread on Variable Rate 5.00%              
Promissory Note with Maturity on April 1, 2021 [Member] | Gill Family Capital Management [Member]                
Subordinated Debt, Ending Balance       2,500,000        
Promissory Note with Maturity on April 1, 2023 [Member] | Gill Family Capital Management [Member]                
Subordinated Debt, Ending Balance       $ 2,000,000        
Promissory Notes with Maturity on April 1, 2021 and April 1, 2023 [Member] | Gill Family Capital Management [Member]                
Debt Instrument, Allowance for Payment Deferral Period       1 year 180 days        
Debt Instrument, Maximum Allowance of Interest Due on Deferred Payments, Percent       60.00%