XML 53 R21.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Major Customers (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2013
Revenue, Net [Abstract] |
Major Customers [Table Text Block] | The following table presents sales revenue for the above-mentioned customers for the three and nine months ended September 30, 2013 and 2012:
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Navistar product sales | $ | 11,330,000 |  |  | $ | 11,902,000 |  |  | $ | 35,548,000 |  |  | $ | 43,756,000 |
Navistar tooling sales | 171,000 |  |  | 5,456,000 |  |  | 760,000 |  |  | 6,494,000 |
Total Navistar sales | 11,501,000 |  |  | 17,358,000 |  |  | 36,308,000 |  |  | 50,250,000 |
PACCAR product sales | 12,044,000 |  |  | 12,507,000 |  |  | 33,896,000 |  |  | 44,028,000 |
PACCAR tooling sales | 4,843,000 |  |  | 40,000 |  |  | 7,052,000 |  |  | 330,000 |
Total PACCAR sales | 16,887,000 |  |  | 12,547,000 |  |  | 40,948,000 |  |  | 44,358,000 |
Other product sales | 8,968,000 |  |  | 7,740,000 |  |  | 27,902,000 |  |  | 29,905,000 |
Other tooling sales | 78,000 |  |  | 36,000 |  |  | 1,319,000 |  |  | 2,241,000 |
Total other sales | 9,046,000 |  |  | 7,776,000 |  |  | 29,221,000 |  |  | 32,146,000 |
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 |

X
- Definition Schedule of sales concentrations by major customers. + References No definition available. + Details
Name: | cmt_MajorCustomersTableTextBlock
Namespace Prefix: | cmt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SalesRevenueNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration