XML 52 R34.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Major Customers (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | $ 54,856,000 | $ 46,124,000 | $ 104,455,000 | $ 87,199,000
Total product sales | 53,514,000 | 43,317,000 | 101,368,000 | 83,981,000
Total tooling sales | 1,342,000 | 2,807,000 | 3,087,000 | 3,218,000
Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 14,526,000 | 13,958,000 | 27,349,000 | 26,671,000
Volvo [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 15,190,000 | 12,759,000 | 29,838,000 | 23,005,000
Paccar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 9,565,000 | 8,568,000 | 19,914,000 | 16,960,000
Yamaha [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 4,251,000 | 4,228,000 | 9,484,000 | 9,228,000
Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 11,324,000 | 6,611,000 | 17,870,000 | 11,335,000
Product Sales [Member] | Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 13,493,000 | 13,919,000 | 26,301,000 | 26,621,000
Product Sales [Member] | Volvo [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 15,011,000 | 11,781,000 | 28,640,000 | 21,856,000
Product Sales [Member] | Paccar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 9,444,000 | 8,484,000 | 19,158,000 | 16,671,000
Product Sales [Member] | Yamaha [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 4,251,000 | 4,228,000 | 9,484,000 | 9,228,000
Product Sales [Member] | Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 11,315,000 | 4,905,000 | 17,785,000 | 9,605,000
Tooling Sales [Member] | Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 1,033,000 | 39,000 | 1,048,000 | 50,000
Tooling Sales [Member] | Volvo [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 179,000 | 978,000 | 1,198,000 | 1,149,000
Tooling Sales [Member] | Paccar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 121,000 | 84,000 | 756,000 | 289,000
Tooling Sales [Member] | Yamaha [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | 0 | 0 | 0 | 0
Tooling Sales [Member] | Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Total sales | $ 9,000 | $ 1,706,000 | $ 85,000 | $ 1,730,000

X
- 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
Name: | us-gaap_ContractsRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 + Details
Name: | us-gaap_SalesRevenueGoodsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_MajorCustomersAxis=cmt_NavistarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=cmt_VolvoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=cmt_PaccarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=cmt_YamahaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=cmt_OtherCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cmt_SalesByProductTypeAxis=cmt_ProductSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cmt_SalesByProductTypeAxis=cmt_ToolingSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |