XML 1054 R44.htm IDEA: XBRL DOCUMENT v2.4.0.6
Summary of Significant Accounting Policies (Details 4)
 3 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Net loss per common share          
Total shares excluded from calculation 3,002,901 1,365,243 2,587,516 2,901,948 1,669,282
Stock options
          
Net loss per common share          
Total shares excluded from calculation 480,415 447,025 502,249 498,562 478,554
Restricted Stock and Restricted Stock Units
          
Net loss per common share          
Total shares excluded from calculation 40,121 9,671 38,089 8,555 13,021
Convertible preferred stock
          
Net loss per common share          
Total shares excluded from calculation 73,747 73,747 73,747 73,747 124,426
Common stock issuable
          
Net loss per common share          
Total shares excluded from calculation     0   46,943
Options issued in connection with the October 2010 financing
          
Net loss per common share          
Total shares excluded from calculation     0 891,771  
Common stock warrants
          
Net loss per common share          
Total shares excluded from calculation 1,973,431 834,800 1,973,431 1,429,313 1,006,338