Annual and transition report of foreign private issuers pursuant to sections 13 or 15(d)

Consolidated Balance Sheets (Parenthetical)

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Consolidated Balance Sheets (Parenthetical) (USD $)
Mar. 31, 2012
Mar. 31, 2011
Consolidated Balance Sheets    
Common shares, Par value (in dollars per share) $ 0.01 $ 0.01
Common shares, Authorized shares 500,000,000 500,000,000
Common shares, Issued shares 45,962,376 44,902,416
Common shares, Outstanding shares 44,815,626 44,596,416