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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 |

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