Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment (Details Textual)

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Property, Plant and Equipment (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Property Plant and Equipment (Textual) [Abstract]      
Depreciation expense $ 1,851 $ 1,685 $ 1,334