Quarterly report pursuant to sections 13 or 15(d)

Stock Compensation Expense (Detail)

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Stock Compensation Expense (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Allocated Stock compensation expense $ 630 $ 69
Product development
   
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Allocated Stock compensation expense   69
General and administrative
   
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Allocated Stock compensation expense $ 630