XML 18 R29.htm IDEA: XBRL DOCUMENT v2.4.0.8
Dilutive Shares Which Could Exist Pursuant to Exercise of Outstanding Stock Instruments and Which were not Included in Calculation (Detail)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Dilutive shares not included in calculation 11,421,214 13,704,230
Warrant
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Dilutive shares not included in calculation 5,505,579 7,429,241
Stock Option
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Dilutive shares not included in calculation 3,365,198 3,656,217
Contingently Issuable Shares
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Dilutive shares not included in calculation 2,550,437 2,618,772