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USD ($)

USD ($) / shares

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CAD (&amp;#x24;)

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3/31/2011
USD ($)
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12/31/2010
USD ($)
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 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 157
 -Paragraph 32
 -Subparagraph c

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 -Publisher AICPA
 -Name Accounting Principles Board Opinion (APB)
 -Number 21
 -Paragraph 16, 20

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 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 133
 -Paragraph 45
 -Subparagraph b(2)

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