Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

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 June 30, 2014 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	49,281	$	—	$	—		$	49,281
Short-term investments		50,602		—		—			50,602
Warrant liabilities		—		—		(11,948	)		(11,948	)

The following table summarizes fair value measurements by level at December 31, 2013 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	10,281	$	—	$	—		$	10,281
Short-term investments		27,085		—		—			27,085
Warrant liabilities		—		—		(24,182	)		(24,182	)