Warrants - Issued November 11, 2014 Monte Carlo (Details) - $ / shares		12 Months Ended
	Nov. 11, 2014	Dec. 31, 2015	Dec. 31, 2014	Nov. 23, 2015	Oct. 07, 2015	Dec. 31, 2013
Fair value assumptions and methodology for assets and liabilities
Number of warrants (in shares)		4,567,207	1,610,069			1,139,535
Warrants Issued November 11, 2014, Liability
Fair value assumptions and methodology for assets and liabilities
Number of warrants (in shares)	80,000	80,000	80,000
CDTi stock price (in dollars per share)	$ 2.46	$ 0.94	$ 1.81
Strike price (in dollars per share)	$ 1.75		$ 1.75		$ 1.75
Expected volatility	76.60%	95.50%	77.00%
Risk-free interest rate	1.70%	1.50%	1.60%
Expected life in years	5 years	3 years 10 months 24 days	4 years 10 months 24 days
November 23, 2015 Offering
Fair value assumptions and methodology for assets and liabilities
CDTi stock price (in dollars per share)				$ 1.22
November 23, 2015 Offering | Warrants Issued November 11, 2014, Liability
Fair value assumptions and methodology for assets and liabilities
Strike price (in dollars per share)		$ 1.22