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USD ($)

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USD ($)

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USD ($)

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USD ($)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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10/1/2010 - 12/31/2010
USD ($) / shares

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10/1/2009 - 12/31/2009
USD ($) / shares

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4/1/2010 - 12/31/2010
USD ($) / shares

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4/1/2009 - 12/31/2009
USD ($) / shares
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 -Name Statement of Financial Accounting Standard (FAS)
 -Number 123R
 -Paragraph 64

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 -Paragraph A240
 -Subparagraph a

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4/1/2010 - 12/31/2010
USD ($) / shares

USD ($)
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 -Publisher FASB
 -Name Emerging Issues Task Force (EITF)
 -Number 99-7
 -Paragraph 1

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