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Inventory (Tables)
9 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Inventory (Tables)

        December 31,     March 31,
      2015     2015
Inventory (in thousands)      
     Work-in-process   $ 215    $ 169 
     Finished goods     571      535 
          Total   $ 786    $ 704