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Major Customers (Details) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Revenue, Major Customer [Line Items] |  |  |  |
Total product sales | $ 32,146,000 | $ 41,209,000 | $ 65,004,000 | $ 85,540,000
Total tooling sales | 2,535,000 | 3,335,000 | 4,039,000 | 3,533,000
Total sales | 34,681,000 | 44,544,000 | 69,043,000 | 89,073,000
Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 12,540,000 | 16,018,000 | 24,807,000 | 32,892,000
Paccar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 12,590,000 | 15,278,000 | 24,061,000 | 31,811,000
Yamaha [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 2,907,000 | 3,743,000 | 6,914,000 | 7,946,000
Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 6,644,000 | 9,505,000 | 13,261,000 | 16,424,000
Product Sales [Member] | Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 11,980,000 | 15,055,000 | 24,218,000 | 31,854,000
Product Sales [Member] | Paccar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 11,030,000 | 15,082,000 | 21,852,000 | 31,521,000
Product Sales [Member] | Yamaha [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 2,907,000 | 3,743,000 | 6,914,000 | 7,942,000
Product Sales [Member] | Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 6,229,000 | 7,329,000 | 12,020,000 | 14,223,000
Tooling Sales [Member] | Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 560,000 | 963,000 | 589,000 | 1,038,000
Tooling Sales [Member] | Paccar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 1,560,000 | 196,000 | 2,209,000 | 290,000
Tooling Sales [Member] | Yamaha [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 0 | 0 | 0 | 4,000
Tooling Sales [Member] | Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | $ 415,000 | $ 2,176,000 | $ 1,241,000 | $ 2,201,000

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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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