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Commitments and Contingencies (Long-term Supply Agreement) (Details)
$ in Thousands
12 Months Ended
Mar. 31, 2016
USD ($)
Long-term Purchase Commitment [Line Items]  
2017 $ 1,044
2018 1,013
2019 982
2020 560
2021 0
Thereafter 0
Total purchase commitment $ 3,599
Third-party Manufacturing  
Long-term Purchase Commitment [Line Items]  
Supply agreement, term 10 years