Consolidation, Policy [Policy Text Block]

b. Principles of Consolidation

The unaudited condensed consolidated financial statements include the financial statements of the Company and its wholly owned subsidiaries. Intercompany transactions and balances have been eliminated in consolidation.

Investments in which the Company has at least a 20%, but not more than a 50% interest are generally accounted for under the equity method. Investment interests below 20% are generally accounted for under the cost method, except if the Company could exercise significant influence, the investment would be accounted for under the equity method. The Company’s judgment regarding the level of influence over each equity method investment includes considering key factors such as the Company’s ownership interest, representation on the Board of Directors, participation in policy-making decisions and material intercompany transactions. The Company includes its proportionate share of the net income or loss of equity-method investees in its unaudited condensed consolidated statements of comprehensive loss.

Concentration Risk, Credit Risk, Policy [Policy Text Block]

d. Concentration of Risk

For the three and six months ended June 30, 2014, one automotive original equipment manufacturer (“OEM”) customer within the Catalyst segment accounted for 43% and 42%, respectively, of the Company’s revenues. This customer accounted for 41% of the Company’s revenues for the three and six months ended June 30, 2013. This customer accounted for 31% and 24% of the Company’s accounts receivable at June 30, 2014 and December 31, 2013, respectively. Another customer accounted for 10% of the Company’s accounts receivable at June 30, 2014. No other customers accounted for 10% or more of the Company’s revenues or accounts receivable for these periods.

For the periods presented below, certain vendors accounted for 10% or more of the Company’s raw material purchases as follows:


	Three Months Ended		Six Months Ended
	June 30,		June 30,
Vendor	2014	2013	2014	2013
A	7%	17%	17%	15%
B	19%	20%	24%	18%
C	10%	8%	10%	13%
D	12%	12%	13%	13%

Vendor A above is a catalyst supplier, vendors B and D above are substrate suppliers and vendor C is a rare earth materials supplier.

Fair Value Measurement, Policy [Policy Text Block]

f. Fair Value Measurements

The Company measures certain financial assets and liabilities at fair value in accordance with a hierarchy which requires an entity to maximize the use of observable inputs which reflect market data obtained from independent sources and minimize the use of unobservable inputs. There are three levels of inputs that may be used to measure fair value:

· Level 1: Quoted prices (unadjusted) in active markets for identical assets or liabilities;

· Level 2: Inputs other than quoted prices included within Level 1 that are either directly or indirectly observable including quoted prices for similar instruments in active markets and quoted prices for identical or similar instruments in markets that are not active; and

· Level 3: Unobservable inputs in which little or no market activity exists, therefore requiring an entity to develop its own assumptions about the assumptions that market participants would use in pricing.

The Company records its liability-classified warrants at fair value in accordance with the fair value measurement framework. See Note 10 for further information on these liability-classified warrants. The valuation inputs hierarchy classification for the warrant liability measured at fair value on a recurring basis is summarized as follows (in thousands):

Warrant liability	Level 1	Level 2	Level 3
As of June 30, 2014	-	-	$	1,647
As of December 31, 2013	-	-	$	939

The following is a reconciliation of the warrant liability measured at fair value using Level 3 inputs (in thousands):

	Six Months Ended June 30,
	Six Months Ended June 30,
	2014		2013
Balance at beginning of period	$	939	$	10
Issuance of common stock warrants		1,531		-
Exercise of common stock warrants		(2,505)		-
Remeasurement of common stock warrants		1,682		(6)
Balance at end of period	$	1,647	$	4

Reclassification, Policy [Policy Text Block]

h. Reclassifications

Certain prior-period amounts have been reclassified to conform to the current period presentation. These changes had no impact on the previously reported consolidated results of operations or stockholders' equity.