Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

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, 2013 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III		Total
Cash equivalents	$	5,144	$	—	$	—	$	5,144
Short-term investments		17,000		—		—		17,000
Warrant liabilities		—		—		7,145		7,145

The following table summarizes fair value measurements by level at December 31, 2012 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III		Total
Cash equivalents	$	13,188	$	—	$	—	$	13,188
Short-term investments		24,000		—		—		24,000
Warrant liabilities		—		—		3,972		3,972