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Public float threshold at which the company is no longer limited in their sale of securities in a primary offering.

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The maximum number of securities permitted to be issued by the Shelf Registration.

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Per Unit price of units sold under Shelf Registration.

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Number of units sold under the shelf registration.

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Number of shares in per unit sold under Shelf Registration.

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The total number of shares agreed to be purchased as per the agreement.

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Number of warrants exercised during the period.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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The cash inflow associated with the amount received from holders exercising their stock warrants.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Price of a single share of a number of saleable stocks of a company.

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Liquidity and Going Concern (Details) (USD $)	0 Months Ended		3 Months Ended		0 Months Ended
Liquidity and Going Concern (Details) (USD $)	Oct. 20, 2014	Jul. 03, 2013	Mar. 31, 2015	Mar. 31, 2014	Apr. 04, 2014	Nov. 04, 2014	Dec. 31, 2014	Dec. 31, 2013	May 15, 2012	Nov. 11, 2014
Liquidity and Going Concern (Details) [Line Items]
Retained Earnings (Accumulated Deficit)			$ (194,084,000)				$ (191,055,000)
Cash			4,250,000us-gaap_Cash	3,597,000us-gaap_Cash			7,220,000us-gaap_Cash	3,909,000us-gaap_Cash
Long-term Line of Credit			3,105,000us-gaap_LineOfCredit				2,841,000us-gaap_LineOfCredit
Shelf Registration, Authorized Amount									50,000,000cdti_ShelfRegistrationAuthorizedAmount
Shelf Registration Public Float, Threshold									75,000,000
Shelf Registration, Units Sold (in Shares)		1,730,000cdti_ShelfRegistrationUnitsSold
Shelf Registration, Unit Price (in Dollars per share)		$ 1.25cdti_ShelfRegistrationUnitPrice
Proceeds from Warrant Exercises				1,000,000us-gaap_ProceedsFromWarrantExercises
Proceeds from Divestiture of Businesses	1,300,000
Series A Warrants [Member] \| Common Stock [Member] \| Subscription Agreement [Member]
Liquidity and Going Concern (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)						388,393
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)						$ 3.25
Share Price (in Dollars per share)						$ 2.80
Series B Warrants [Member] \| Common Stock [Member] \| Subscription Agreement [Member]
Liquidity and Going Concern (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)						168,571
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)						$ 0.01
Share Price (in Dollars per share)						$ 2.79
Common Stock [Member] \| Shelf Registration [Member]
Liquidity and Going Concern (Details) [Line Items]
Shelf Registration, Units Sold, Share Component Per Unit (in Shares)		1
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)		1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)		$ 1.25
Shelf Registration [Member]
Liquidity and Going Concern (Details) [Line Items]
Shelf Registration, Units Sold (in Shares)					2,030,000
Shelf Registration, Unit Price (in Dollars per share)					$ 3.40
Shelf Registration, Units Sold, Share Component Per Unit (in Shares)					1
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)		1,700,000			1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)		$ 1.25			$ 4.20
Warrants Exercised During the Period (in Shares)		800,000
Proceeds from Warrant Exercises		1,000,000
Proceeds from Issuance of Common Stock and Warrants					6,100,000
Subscription Agreement [Member]
Liquidity and Going Concern (Details) [Line Items]
Stock Subscription Agreement,Number of Shares to be Purchased (in Shares)						1,385,000
Proceeds from Issuance of Private Placement						3,800,000
Kanis SA [Member]
Liquidity and Going Concern (Details) [Line Items]
Long-term Debt, Gross										7,500,000
Reno Business [Member]
Liquidity and Going Concern (Details) [Line Items]
Proceeds from Divestiture of Businesses	1,300,000
Line Of Credit With FGI [Member]
Liquidity and Going Concern (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			7,500,000
Long-term Line of Credit			3,100,000
Line of Credit Facility, Current Borrowing Capacity			$ 4,400,000