XML 38 R26.htm IDEA: XBRL DOCUMENT v2.4.0.6
Equity - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 9 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2012
Sep. 30, 2012
Sep. 30, 2012
Sep. 30, 2011
Feb. 29, 2012
Restricted Stock Units (RSUs)
Sep. 30, 2012
Restricted Stock Units (RSUs)
Sep. 30, 2012
Restricted Stock Units (RSUs)
Stockholders Equity Note [Line Items]              
Shares issued, exercise of stock options   622,266 3,107,913        
Net proceeds from exercise of stock options   $ 1,200,000 $ 7,834,000 $ 5,073,000      
Gross proceeds from exercise of stock options   1,200,000 7,800,000        
Shares issued, exercise of warrants   1,068,654 10,881,276        
Gross proceeds from exercise of warrants   1,600,000 16,600,000        
Net proceeds from exercise of warrants   1,600,000 16,526,000 18,661,000      
Restricted stock units granted         584,400    
Restricted stock units, expiration date         Feb. 01, 2015    
Expenses related to vesting of the RSU           $ 300,000 $ 1,200,000
Restricted stock units, shares issued 97,398