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Business Combinations - Consideration Transferred (Details) - OMT, Inc. $ / shares in Units, shares in Thousands, $ in Thousands | Jan. 08, 2016 USD ($) $ / shares shares
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Business Acquisition [Line Items] |
Cash consideration | $ 96,006
Actual number of shares issued (shares) | shares | 790
Multiplied by: Ligand closing share price on January 8, 2016 (in USD per share) | $ / shares | $ 98
Total share consideration | $ 77,373
Total consideration | $ 173,379

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