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License, Collaborative and Employment Agreements and Commitments (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Other Commitments [Line Items]  
2015 $ 442us-gaap_OtherCommitmentDueInNextTwelveMonths
2016 10us-gaap_OtherCommitmentDueInSecondYear
2017 10us-gaap_OtherCommitmentDueInThirdYear
2018 10us-gaap_OtherCommitmentDueInFourthYear
2019 10us-gaap_OtherCommitmentDueInFifthYear
Total $ 482us-gaap_OtherCommitmentDueInFourthAndFifthYear