Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2015

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, 2015 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	38,437	$	—	$	—		$	38,437
Short-term investments		15,002		—		—			15,002
Warrant liabilities		—		—		(4,567	)		(4,567	)

The following table summarizes fair value measurements by level at December 31, 2014 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	31,159	$	—	$	—		$	31,159
Short-term investments		45,622		—		—			45,622
Warrant liability		—		—		(5,131	)		(5,131	)