Warrants (Tables)

3 Months Ended

Mar. 31, 2014

Warrants (Tables) [Line Items]

Schedule of Sharebased Compensation Warrants Activity [Table Text Block]

	Shares	Weighted Average Exercise Price		Range of Exercise Prices
Outstanding at December 31, 2013	1,139,535	$	1.68	$1.25 - $10.40
Warrants exercised	(800,000)	$	1.25	$1.25
Outstanding at March 31, 2014	339,535	$	2.70	$1.25 - $10.40
Warrants exercisable at March 31, 2014	319,535	$	3.03	$1.25 - $10.40

Monte Carlo Simulation Model [Member]

Warrants (Tables) [Line Items]

Schedule of Share Based Payment Award Warrants Valuation Assumptions [Table Text Block]

	March 31, 2014		December 31, 2013
CDTi stock price	$	3.82	$	1.51
Strike price	$	1.25	$	1.25
Expected volatility		79.00%		73.60%
Risk-free interest rate		1.30%		1.80%
Dividend yield		─		─
Expected life in years		4.3		4.5