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Note 2 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Property, Plant, and Equipment, Useful Life [Table Text Block] |
|  | In years |
Building |  | 25 | - | 30 |
Machinery and equipment |  | 3 | - | 15 |
Projects that prolong the life and increase efficiency of machinery |  | 3 | - | 5 |
Light Machinery |  | 5 | - | 10 |
Heavy Machinery |  | 10 | - | 15 |
Office furniture and equipment |  | 5 | - | 8 |
Intellectual Property |  | 9 | - | 15 |
Leasehold improvements |  | 5 | - | 8 |
Furniture and equipment at customer locations |  | 1 | - | 3 |

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- Definition Tabular disclosure of the useful life of physical assets used in the normal conduct of business and not intended for resale. + References No definition available. + Details
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Namespace Prefix: | ctib_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration