XML 52 R83.htm IDEA: XBRL DOCUMENT v2.4.0.6
Warrants and Purchase Options For Purchase of Stock (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 0 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 02, 2011
Jun. 29, 2011
Oct. 02, 2010
Sep. 28, 2010
Oct. 31, 2006
Jun. 30, 2011
Sep. 30, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Oct. 10, 2006
Warrants                      
Number of shares of common stock that can be purchased with each warrant                     1
Exercise price of warrants (in dollars per share)                     $ 5.00
Warrants outstanding (in shares)                   4,617,499  
Warrants exercised (in shares)             4,337,909        
Cash proceeds from exercise of warrants             $ 21,690   $ 21,690    
Warrants repurchased by the broker (in shares)       245,846              
Repurchase of warrants       277         277    
Warrants expired (in shares)     33,744                
Unit Purchase Options                      
Purchase of Unit Purchase Options by the underwriter, Early Bird Capital         450,000            
Number of shares of common stock that can be purchased with each UPO         1            
Number of warrants that can be purchased with each UPO         1            
Exercise price for cashless conversion of one share of common stock (in dollars per share) $ 8.80                    
UPO exercised (in shares)   450,000                  
Previous day's closing price used to calculate the number of shares of common stock issuable on exercise of UPO (in dollars per share)   $ 13.31                  
Number of shares of common stock issuable on exercise of UPO at the previous day's closing price   152,480                  
Cash payment made in lieu of issuance of shares           $ 2,000   $ 2,030