Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Mar. 31, 2013
Components of inventories    
Raw materials $ 8,302 $ 6,252
Finished goods and sub-assemblies 9,368 5,971
Total inventories $ 17,670 $ 12,223