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Basic and Diluted Net Loss Per Share
3 Months Ended
Sep. 30, 2011
Notes to Financial Statements 
Basic and Diluted Net Loss Per Share

Note 2 - Basic and Diluted Net Loss Per Share 

Basic net loss per share is computed using the weighted average number of common shares outstanding during the period. Diluted net loss per share is computed using the weighted average number of common and potential common shares outstanding during the period. Potential common shares consist of shares issuable upon the exercise of stock options (using the treasury stock method). Options to purchase 6,833,037 and 8,009,130 shares of common stock were outstanding at September 30, 2011 and 2010, respectively, but have been excluded from the computation of diluted net loss per share because their effect was anti-dilutive.