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Business Combinations (Details) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Jan. 31, 2011
CyDex
Business Acquisition [Line Items]      
Cash paid to CyDex shareholders     $ 31,572
Estimated fair value of contingent consideration     17,585
Total purchase consideration     49,157
Allocation of Purchase Price (in thousands):      
Cash     85
Accounts receivable     1,202
Inventory     2,414
In-process research and development     3,200
Intangible assets with definite lives     47,469
Goodwill 12,238 12,238 11,538
Other assets     1,311
Liabilities assumed     (18,062)
Total purchase consideration     $ 49,157