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Accounts Payable And Accrued Expenses (Schedule Of Accounts Payable And Accrued Expenses) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Mar. 31, 2012
Accounts Payable And Accrued Expenses [Abstract]    
Accounts payable $ 7,207 $ 8,191
Accrued investories in-transit 2,712 3,330
Accrued miscellaneous expenses 8,494 9,595
Accrued outside services 1,649 113
Accrued subcontractor program costs 1,924 1,885
Accrued compensation 4,208 8,380
Income taxes payable 108 192
Accrued warranty 4,018 5,896
Total $ 30,320 $ 37,582