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Major Customers (Details) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Revenue, Major Customer [Line Items] |  |
Total product sales | $ 40,664,000 | $ 32,858,000
Total tooling sales | 411,000 | 1,504,000
Total sales | 41,075,000 | 34,362,000
Navistar [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 12,713,000 | 12,267,000
Volvo [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 10,246,000 | 1,746,000
Paccar [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 8,392,000 | 11,471,000
Yamaha [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 5,000,000 | 4,007,000
Other Customers [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 4,724,000 | 4,871,000
Product Sales [Member] | Navistar [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 12,702,000 | 12,238,000
Product Sales [Member] | Volvo [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 10,075,000 | 1,169,000
Product Sales [Member] | Paccar [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 8,187,000 | 10,822,000
Product Sales [Member] | Yamaha [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 5,000,000 | 4,007,000
Product Sales [Member] | Other Customers [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 4,700,000 | 4,622,000
Tooling Sales [Member] | Navistar [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 11,000 | 29,000
Tooling Sales [Member] | Volvo [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 171,000 | 577,000
Tooling Sales [Member] | Paccar [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 205,000 | 649,000
Tooling Sales [Member] | Yamaha [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | 0 | 0
Tooling Sales [Member] | Other Customers [Member] |  |
Revenue, Major Customer [Line Items] |  |
Total sales | $ 24,000 | $ 249,000

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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=26872669&loc=d3e20235-122688 + Details
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- 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=26872669&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=26872669&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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