Revenue (Tables)

12 Months Ended

Dec. 31, 2014

Revenue Recognition [Abstract]

Revenue, by Arrangement, Disclosure

Revenues recognized from grants and other sources are as follows:

	Year Ended December 31,
	2014		2013		2012
	(In thousands)
Small Business Innovative Research Grant (SBIR)	$	539	$	630	$	721
Vulcan Inc.	—		970		4,677
Life Science Development Fund Authority (LSDF)	—		—		624
Total revenue	$	539	$	1,600	$	6,022