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Major Customers (Tables) | 3 Months Ended
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Mar. 31, 2014
Revenue, Net [Abstract] |
Major Customers [Table Text Block] | The following table presents sales revenue for the above-mentioned customers for the three months ended March 31, 2014 and 2013:
| Three Months Ended
| March 31,
| 2014 |  | 2013
Navistar product sales | $ | 12,702,000 |  |  | $ | 12,238,000 |
Navistar tooling sales | 11,000 |  |  | 29,000 |
Total Navistar sales | 12,713,000 |  |  | 12,267,000 |
Volvo product sales | 10,075,000 |  |  | 1,169,000 |
Volvo tooling sales | 171,000 |  |  | 577,000 |
Total Volvo sales | 10,246,000 |  |  | 1,746,000 |
PACCAR product sales | 8,187,000 |  |  | 10,822,000 |
PACCAR tooling sales | 205,000 |  |  | 649,000 |
Total PACCAR sales | 8,392,000 |  |  | 11,471,000 |
Yamaha product sales | 5,000,000 |  |  | 4,007,000 |
Yamaha tooling sales | — |  |  | — |
Total Yamaha sales | 5,000,000 |  |  | 4,007,000 |
Other product sales | 4,700,000 |  |  | 4,622,000 |
Other tooling sales | 24,000 |  |  | 249,000 |
Total other sales | 4,724,000 |  |  | 4,871,000 |
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 |

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