Restructuring Charges - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 31, 2013	Mar. 31, 2012 Employee	Mar. 31, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring charges to operations	$ 1,065	$ 603	$ 0
Restructuring program number of positions eliminated or moved		12
Restructuring charges related to severance costs		603
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges to operations	$ 1,140	$ 603

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

+ References

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