Annual report pursuant to Section 13 and 15(d)

Dispositions and Closures (Details)

v3.6.0.2
Dispositions and Closures (Details) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Jul. 01, 2014
Sep. 30, 2014
Sep. 27, 2014
Dec. 31, 2016
Dec. 31, 2015
Jan. 03, 2015
Aug. 29, 2014
Jun. 27, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Loss before income taxes       $ (99,334) $ (1,251,058) $ (7,156,524)    
Ram Fab [Member]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Transaction value (less than)             $ 10,000,000  
Closing costs associated with closure of facility     $ 1,996,000          
Loss before income taxes     $ 947,000          
Bristol Fab [Member]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Closing costs associated with closure of facility         1,902,000 6,988,000    
Pension withdrawal liability         644,000     $ 1,900,000
Bristol Fab and Ram-fab [Member]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Net sales       0 0 21,963,078    
Loss before income taxes       (150,334) (1,902,058) (10,963,524)    
Benefit from income taxes       (51,000) (651,000) (3,807,000)    
Net loss from discontinued operations       (99,334) (1,251,058) $ (7,156,524)    
Pending Litigation [Member] | Synalloy Fabrication, LLC Customer Breach of Contract Case [Member]                
Liabilities                
Litigation damages sought   $ 3,300,000            
Pending Litigation [Member] | Synalloy Fabrication, LLC Customer Breach of Contract Case [Member] | Bristol Fab [Member]                
Liabilities                
Litigation damages sought       $ 99,000 $ 1,251,000      
Withdrawal from Multiemployer Defined Benefit Plan [Member] | Bristol Fab [Member]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Debt Instrument, Term 26 months              
Stated interest rate (percent)         4.51%