Concentration of Business Risk (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
DuPont [Member]
Concentration of Business Risk (Textual) [Abstract]
Percentage of revenue	54.00%	49.00%	63.00%
DSM [Member]
Concentration of Business Risk (Textual) [Abstract]
Percentage of revenue	15.00%
Manufacturing Facility [Member]
Concentration of Business Risk (Textual) [Abstract]
Property and equipment, net	1.5	1.1
DuPont and DSM [Member]
Concentration of Business Risk (Textual) [Abstract]
Percentage of account receivable	75.00%	78.00%