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Description of Business	12 Months Ended
Description of Business	Dec. 31, 2017
Disclosure Text Block [Abstract]
Description of Business	Description of Business CDTi Advanced Materials, Inc. ("CDTi" or the "Company") is a leading provider of technology and solutions to the automotive emissions control markets. The Company possesses market leading expertise in emissions catalyst design and engineering for automotive and off-road applications The Company has a proven ability to develop proprietary materials incorporating various base metals that replace costly platinum group metals ("PGMs") in coatings on vehicle catalytic converters. Recently, the Company has expanded its materials platform to include new synergized-PGM diesel oxidation catalysts (SPGM™ DOC), Base-Metal Activated Rhodium Support (BMARS™), and Spinel™ technologies, and it is in the process of introducing these new catalyst technologies to OEMs and other vehicle catalyst manufacturers in a proprietary powder form. The Company believes that this powder-to-coat business model will allow it to achieve greater scale and higher return on its technology investment than in the past. The Company's business is driven by increasingly stringent global emission standards for internal combustion engines, which are major sources of a variety of harmful pollutants. It has operations in the United States ("U.S."), the United Kingdom, and Sweden as well as an Asian investment.