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Difference Between the Effective Rate Reflected in the Provision for Income Taxes and the Amounts Determined by Applying the Statutory Federal Rate to Earnings Before Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Reconciliation of Provision of Income Taxes [Line Items]    
Statutory provision $ 3,283 $ 4,458
Foreign subsidiary (2,626) (1,677)
State taxes 366 736
Permanent differences 716 6
Prior year taxes 897 34
True up AMT Credit 898  
True up to prior year taxes 56  
Valuation allowance   (1,081)
Other, net 76  
Provision for income taxes $ 3,666 $ 2,476