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Financial Instruments (Fair Value Measurements) (Details) (Recurring, USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Assets: |  |
Assets, fair value | $ 13,411 | $ 16,086
Liabilities: |  |
Liabilities, fair value | 16,814 | 25,904
Current portion of contingent liabilities-CyDex |  |
Liabilities: |  |
Liabilities, fair value | 1,094 | 1,712
Current portion of co-promote termination liability |  |
Liabilities: |  |
Liabilities, fair value | 688 | 4,329
Long-term portion of contingent liabilities-Metabasis |  |
Liabilities: |  |
Liabilities, fair value | 6,657 | 4,196
Long-term portion of contingent liabilities-CyDex |  |
Liabilities: |  |
Liabilities, fair value | 6,086 | 7,599
Liability for short-term investments owed to former licensees |  |
Liabilities: |  |
Liabilities, fair value | 1,841 | 651
Long-term portion of co-promote termination liability |  |
Liabilities: |  |
Liabilities, fair value | 448 | 7,417
Current portion of co-promote termination payments receivable |  |
Assets: |  |
Assets, fair value | 688 | 4,329
Available-for-sale securities |  |
Assets: |  |
Assets, fair value | 12,275 | 4,340
Long-term portion of co-promote termination payments receivable |  |
Assets: |  |
Assets, fair value | 448 | 7,417
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Assets, fair value | 12,275 | 4,340
Liabilities: |  |
Liabilities, fair value | 8,498 | 4,847
Quoted Prices in Active Markets for Identical Assets (Level 1) | Current portion of contingent liabilities-CyDex |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Current portion of co-promote termination liability |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term portion of contingent liabilities-Metabasis |  |
Liabilities: |  |
Liabilities, fair value | 6,657 | 4,196
Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term portion of contingent liabilities-CyDex |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Liability for short-term investments owed to former licensees |  |
Liabilities: |  |
Liabilities, fair value | 1,841 | 651
Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term portion of co-promote termination liability |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Current portion of co-promote termination payments receivable |  |
Assets: |  |
Assets, fair value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale securities |  |
Assets: |  |
Assets, fair value | 12,275 | 4,340
Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term portion of co-promote termination payments receivable |  |
Assets: |  |
Assets, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Assets, fair value | 0 | 0
Liabilities: |  |
Liabilities, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Current portion of contingent liabilities-CyDex |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Current portion of co-promote termination liability |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Long-term portion of contingent liabilities-Metabasis |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Long-term portion of contingent liabilities-CyDex |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Liability for short-term investments owed to former licensees |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Long-term portion of co-promote termination liability |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Current portion of co-promote termination payments receivable |  |
Assets: |  |
Assets, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Available-for-sale securities |  |
Assets: |  |
Assets, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Long-term portion of co-promote termination payments receivable |  |
Assets: |  |
Assets, fair value | 0 | 0
Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Assets, fair value | 1,136 | 11,746
Liabilities: |  |
Liabilities, fair value | 8,316 | 21,057
Significant Unobservable Inputs (Level 3) | Current portion of contingent liabilities-CyDex |  |
Liabilities: |  |
Liabilities, fair value | 1,094 | 1,712
Significant Unobservable Inputs (Level 3) | Current portion of co-promote termination liability |  |
Liabilities: |  |
Liabilities, fair value | 688 | 4,329
Significant Unobservable Inputs (Level 3) | Long-term portion of contingent liabilities-Metabasis |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Significant Unobservable Inputs (Level 3) | Long-term portion of contingent liabilities-CyDex |  |
Liabilities: |  |
Liabilities, fair value | 6,086 | 7,599
Significant Unobservable Inputs (Level 3) | Liability for short-term investments owed to former licensees |  |
Liabilities: |  |
Liabilities, fair value | 0 | 0
Significant Unobservable Inputs (Level 3) | Long-term portion of co-promote termination liability |  |
Liabilities: |  |
Liabilities, fair value | 448 | 7,417
Significant Unobservable Inputs (Level 3) | Current portion of co-promote termination payments receivable |  |
Assets: |  |
Assets, fair value | 688 | 4,329
Significant Unobservable Inputs (Level 3) | Available-for-sale securities |  |
Assets: |  |
Assets, fair value | 0 | 0
Significant Unobservable Inputs (Level 3) | Long-term portion of co-promote termination payments receivable |  |
Assets: |  |
Assets, fair value | $ 448 | $ 7,417

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