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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 |

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