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Commitments and Contingencies (Long-term Supply Agreement) (Details) - Third-party Manufacturing - USD ($)
$ in Thousands
Nov. 01, 2009
Dec. 31, 2016
Long-term Purchase Commitment [Line Items]    
Supply agreement, term 10 years  
2017 (Remaining three months ending March 31, 2017)   $ 258
2018   1,013
2019   982
2020   559
2021   0
Total purchase commitment   $ 2,812