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Major Customers (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Revenue, Major Customer [Line Items] |  |  |  |
Total product sales | $ 32,342,000 | $ 32,149,000 | $ 97,346,000 | $ 117,689,000
Total tooling sales | 5,092,000 | 5,532,000 | 9,131,000 | 9,065,000
Total sales | 37,434,000 | 37,681,000 | 106,477,000 | 126,754,000
Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 11,501,000 | 17,358,000 | 36,308,000 | 50,250,000
Paccar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 16,887,000 | 12,547,000 | 40,948,000 | 44,358,000
Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 9,046,000 | 7,776,000 | 29,221,000 | 32,146,000
Product Sales [Member] | Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 11,330,000 | 11,902,000 | 35,548,000 | 43,756,000
Product Sales [Member] | Paccar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 12,044,000 | 12,507,000 | 33,896,000 | 44,028,000
Product Sales [Member] | Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 8,968,000 | 7,740,000 | 27,902,000 | 29,905,000
Tooling Sales [Member] | Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 171,000 | 5,456,000 | 760,000 | 6,494,000
Tooling Sales [Member] | Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | $ 78,000 | $ 36,000 | $ 1,319,000 | $ 2,241,000

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- Definition Revenue earned during the period arising from products sold or services provided under the terms of a contract, not elsewhere specified in the taxonomy. May include government contracts, construction contracts, and any other contract related to a particular project or product. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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