(10) Significant Customers (Detail) (Customer concentration risk)	12 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Revenue \| Diageo North America, Inc. ("Diageo")
Concentration Risk [Line Items]
Concentration risk, percentage	62.00%	62.00%
Revenue \| Second largest customer
Concentration Risk [Line Items]
Concentration risk, percentage	15.00%	11.00%
Accounts receivable \| Diageo North America, Inc. ("Diageo")
Concentration Risk [Line Items]
Concentration risk, percentage	55.00%	61.00%
Accounts receivable \| Second largest customer
Concentration Risk [Line Items]
Concentration risk, percentage	17.00%	13.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-Section 50

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-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

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-Section 50

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-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-Section 50

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-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611

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