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Computation of Net Loss Per Common Share (Tables)
6 Months Ended
Mar. 31, 2013
Computation of Net Loss Per Common Share [Abstract]  
Schedule of antidilutive securities excluded from computation of net loss per common share
                 
    2013     2012  

Stock options

    9,424,703       8,625,468  

Stock warrants

    53,957       710,109  

Restricted stock units (1)

    3,086,758       2,583,805  

 

(1) Includes 1,162,465 and 1,505,564 shares of restricted stock at March 31, 2013 and 2012, respectively, awarded to directors that have vested but are still restricted until the directors resign.