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Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2012
Commitments and Letters of Credit [Line Items]
Lease expiration date	2026-04
Stand by letter of credit issued	$ 7.9
Long term employment commitment amount	$ 2.5

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- Details

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- Definition

Lease Expiration, Month and Year

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No definition available.

+ Details

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- Definition

Long Term Employment Commitment Amount

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No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

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- Definition

Standby Letters of Credit

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant