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Income Taxes (Narrative) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Jan. 03, 2015 | Dec. 28, 2013
Income Tax Disclosures [Line Items] |  |  |
Income tax payments | $ 2,251,000 | $ 2,091,000 | $ 2,445,000
Deferred Tax Assets, Valuation Allowance | 1,694,000 | 1,570,000 |
State Jurisdiction [Member] |  |  |
Income Tax Disclosures [Line Items] |  |  |
Net operating loss carryforwards | 47,042,000 | 50,774,000 |
Portion of NOL subject to valuation allowance | 47,042,000 |  |
Valuation allowance for net operating loss carrryforwards | 1,616,000 | 1,570,000 |
Valuation allowance, other deferred tax assets [Member] |  |  |
Income Tax Disclosures [Line Items] |  |  |
Deferred Tax Assets, Valuation Allowance | 78,000 |  |
Bristol Fab and Ram-fab [Member] |  |  |
Income Tax Disclosures [Line Items] |  |  |
Benefit from income taxes | 651,000 | $ 3,807,000 | $ 812,000
Continuing Operations [Member] | Operating Loss Carryforwards [Member] | State Jurisdiction [Member] |  |  |
Income Tax Disclosures [Line Items] |  |  |
Increase in valuation allowance during the period | 94,000 |  |
Discontinued Operations [Member] | Operating Loss Carryforwards [Member] | State Jurisdiction [Member] |  |  |
Income Tax Disclosures [Line Items] |  |  |
Increase in valuation allowance during the period | $ 30,000 |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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- Definition Amount of tax expense (benefit) on gain (loss) not previously recognized resulting from the disposal of a discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721525-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65896914&loc=d3e38679-109324 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32672-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
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