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Total Outstanding Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 28, 2012
Mar. 31, 2012
Debt Instrument [Line Items]    
Bank term loan $ 750 $ 1,000
Bank line of credit 0 500
MEDC/MSF loans 1,064 1,461
Total $ 1,814 $ 2,961