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Inventory (Tables)
 6 Months Ended
Sep. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventory at September 30, 2017 and March 31, 2017 consisted of the following (in thousands):
 
September 30,
2017
 
March 31,
2017
Raw materials
$
5,776

 
$
4,263

Work-in-process
1,010

 
426

Finished goods
6,543

 
8,016

Deferred program costs
2,654

 
4,757

Net inventory
$
15,983

 
$
17,462