Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value Measurements [Abstract]

Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis

The following table summarizes fair value measurements by level at September 30, 2012 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I	Level II	Level III	Total
Cash equivalents	$ 11,685	$           —	$ —	$ 11,685
Short-term investments	10,000	—	—	10,000
Warrant liability	—	—	12,719	12,719

The following table summarizes fair value measurements by level at December 31, 2011 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I	Level II	Level III	Total
Cash equivalents	$ 17,073	$           —	$ —	$ 17,073
Short-term investments	18,058	—	—	18,058
Warrant liability	—	—	6,739	6,739