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Summary of Significant Accounting Policies (Narrative) (Details)
 12 Months Ended
Nov. 21, 2014
Dec. 31, 2016
USD ($)
subsidiaries
segments
Dec. 31, 2015
USD ($)
Jan. 03, 2015
USD ($)
Accounting Policies [Line Items]        
Inventory Adjustments   $ 43,000 $ 1,237,000  
Number of operating segments (segments) | segments   2    
Goodwill impairment   $ 0 17,158,249 $ 0
Intangible asset depreciation period (years) 8 years      
Deferred charges and intangible assets   20,708,000 20,572,000  
Accumulated amortization on deferred charges   8,253,000 5,775,000  
Shipping costs   4,488,000 5,155,000 5,705,000
Research and development expense   603,000 548,000 531,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]        
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months   2,393,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Two   2,228,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Three   2,056,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Four   1,897,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Five   1,807,000    
Finite-Lived Intangible Assets, Amortization Expense, after Year Five   2,074,000    
Amortization expense   2,460,000 2,277,000 1,407,000
Inventory Valuation Reserve [Member]        
Accounting Policies [Line Items]        
Charged to (Reduction of) Cost and Expenses   984,000 767,000 3,975,000
Valuation Allowances and Reserves, Deductions   700,000 810,000 5,456,000
Allowance for Doubtful Accounts [Member]        
Accounting Policies [Line Items]        
Charged to (Reduction of) Cost and Expenses   (45,000) 104,000 667,000
Valuation Allowances and Reserves, Deductions   $ 120,000 972,000 631,000
Allowance for Doubtful Accounts [Member] | Specialty Pipe And Tube, Inc. [Member]        
Accounting Policies [Line Items]        
Charged to (Reduction of) Cost and Expenses       76,000
Minimum [Member]        
Accounting Policies [Line Items]        
Accounts receivable, payment terms (days)   30 days    
Intangible asset depreciation period (years)   8 years    
Maximum [Member]        
Accounting Policies [Line Items]        
Accounts receivable, payment terms (days)   60 days    
Intangible asset depreciation period (years)   15 years    
Land improvements and buildings [Member] | Minimum [Member]        
Accounting Policies [Line Items]        
Depreciation useful life (years)   10 years    
Land improvements and buildings [Member] | Maximum [Member]        
Accounting Policies [Line Items]        
Depreciation useful life (years)   40 years    
Machinery, fixtures and equipment [Member] | Minimum [Member]        
Accounting Policies [Line Items]        
Depreciation useful life (years)   3 years    
Machinery, fixtures and equipment [Member] | Maximum [Member]        
Accounting Policies [Line Items]        
Depreciation useful life (years)   20 years    
Software licenses [Member]        
Accounting Policies [Line Items]        
Depreciation useful life (years)   5 years    
Metals Segment [Member]        
Accounting Policies [Line Items]        
Number of subsidiaries (subsidiaries) | subsidiaries   3    
Goodwill impairment   $ 0 17,158,249 $ 0
Specialty Chemicals Segment [Member]        
Accounting Policies [Line Items]        
Number of operating segments (segments) | segments   1    
Number of subsidiaries (subsidiaries) | subsidiaries   2    
Goodwill impairment     $ 0  
Bristol Metals, LLC, Palmer of Texas Tanks, Inc., and Specialty Pipe & Tube [Member] | Metals Segment [Member]        
Accounting Policies [Line Items]        
Ownership percentage of subsidiary (percent)   100.00% 100.00%  
Manufacturers Soap and Chemical Company [Member] | Specialty Chemicals Segment [Member]        
Accounting Policies [Line Items]        
Ownership percentage of subsidiary (percent)   100.00%    
Subsidiaries [Member]        
Accounting Policies [Line Items]        
Inventory Adjustments   $ 93,000    
Deferred Charges [Member] | Minimum [Member]        
Accounting Policies [Line Items]        
Intangible asset depreciation period (years)   3 years    
Deferred Charges [Member] | Maximum [Member]        
Accounting Policies [Line Items]        
Intangible asset depreciation period (years)   10 years    
Customer Relationships [Member]        
Accounting Policies [Line Items]        
Weighted average amortization period (years)   12 years    
Obsolescence reserve [Member] | Inventory Valuation Reserve [Member]        
Accounting Policies [Line Items]        
Inventory reserves   $ 697,000 $ 658,000  
Physical inventory shrink reserve [Member] | Inventory Valuation Reserve [Member]        
Accounting Policies [Line Items]        
Inventory reserves   $ 269,000 $ 24,000