Annual report pursuant to Section 13 and 15(d)

Organization and Summary of Significant Accounting Policies (Tables)

v2.4.0.6
Organization and Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2012
Organization and Summary of Significant Accounting Policies [Abstract]  
Schedule of Weighted Average Assumptions Used
    2012     2011     2010  
Expected volatility     63%-72%       64%-71%       61%-68 %
Weighted-average volatility     65 %     69 %     66 %
Expected dividends     --       --       --  
Expected term (in years)     5.0-6.3       5.3-6.3       6.0-6.3  
Risk-free rate     0.6%-1.2 %     1.3%-2.4 %     1.7%-2.4 %