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, 2012
Mar. 31, 2012
Components of inventories    
Raw material $ 5,855 $ 5,290
Finished goods and sub-assemblies 6,085 6,095
Reserve for excess and obsolete inventory and net realizable value (1,962) (1,479)
Total inventory $ 9,978 $ 9,906