License and Collaboration Agreements (Tables)

3 Months Ended

Mar. 31, 2016

Baxalta [Member]

Schedule of Assets and Liabilities under Collaborative Arrangements

As of March 31, 2016 and December 31, 2015, the Company maintained the following assets and liabilities related to the Baxalta Agreement:

(in thousands)	March 31, 2016		December 31, 2015
Accounts receivable, billed	$	1,250	$	1,336
Accounts receivable, unbilled		914		626
Deferred revenues		88,217		97,365