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Segment, Customer and Geographic Information (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment, Customer and Geographic Information (Textual) [Abstract]
Government grants and cooperative agreements	$ 0	$ 1,479	$ 91	$ 1,915
Government grants and cooperative agreements [Member]
Segment, Customer and Geographic Information (Textual) [Abstract]
Company's total product revenue from significant customers	0.00%	16.00%	1.00%	8.00%
Government grants and cooperative agreements	$ 0	$ 1,500	$ 100	$ 1,900

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- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

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- Definition

Revenue earned during the period from non-repayable sum of money awarded to an entity to carry out a specific purpose as provided in grant agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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