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Short Term Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Mar. 31, 2013
Short Term Debt    
Short Term Debt $ 10 $ 3,777
Equipment Leases
   
Short Term Debt    
Short Term Debt 10 17
Senior Secured Convertible Note
   
Short Term Debt    
Short Term Debt   2,714
Secured Note
   
Short Term Debt    
Short Term Debt   363
Convertible Note
   
Short Term Debt    
Short Term Debt   $ 683