INCOME TAXES (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net operating loss and tax credit carryforwards
Number of states in which the entity primarily operates or has operated and has income tax nexus	3
Federal
Net operating loss and tax credit carryforwards
Net operating loss carryforwards	$ 98.4
Period of recognition of unrealized loss or gain after the ownership change	5 years
Federal | R&D credit
Net operating loss and tax credit carryforwards
Tax credit carryforwards	20.8
Tax credit carryforwards with substantial limitations on use	13.8
Federal | Ownership change in October 2007
Net operating loss and tax credit carryforwards
Net operating loss carryforwards	28.3
Annual limitation	4.5
Federal | Ownership changes in June 2009 and December 2009
Net operating loss and tax credit carryforwards
Net operating loss carryforwards	67.7
Annual limitation	6.0
Federal | Prior to merger
Net operating loss and tax credit carryforwards
Net operating loss carryforwards	33.0
Federal | AVANT
Net operating loss and tax credit carryforwards
Loss carryforwards with limitations on use	40.4
Loss carryforwards remotely likely to be utilized in future periods	60.8
Federal | AVANT | Prior to merger
Net operating loss and tax credit carryforwards
NOL, net of expirations and utilization	101.2
NOLs expired	16.4	14.8
Federal | CuraGen | Prior to acquisition
Net operating loss and tax credit carryforwards
Net operating loss carryforwards	518.3
State
Net operating loss and tax credit carryforwards
Tax credit carryforwards with substantial limitations on use	99.2
State | R&D credit
Net operating loss and tax credit carryforwards
Tax credit carryforwards	14.4
Tax credit carryforwards with substantial limitations on use	$ 10.2