XML 64 R38.htm IDEA: XBRL DOCUMENT v2.4.0.8
Common and Preferred Stock - Additional Information (Detail) (USD $)
 6 Months Ended 280 Months Ended 6 Months Ended 0 Months Ended
Jun. 30, 2014
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2014
Senior convertible notes due August 15, 2015
Dec. 31, 2013
Senior convertible notes due August 15, 2015
Aug. 18, 2010
Senior convertible notes due August 15, 2015
Jun. 30, 2014
Deerfield
Senior convertible notes due December 31, 2019
Feb. 28, 2014
Deerfield
Senior convertible notes due December 31, 2019
Jul. 01, 2013
Deerfield
Senior convertible notes due December 31, 2019
Notes Issued in Four Equal Tranches
Tranche
Jun. 30, 2014
Deerfield
Senior convertible notes due December 31, 2019
Notes Issued in Four Equal Tranches
Jul. 01, 2013
Deerfield
Senior convertible notes due December 31, 2019
Notes Issued in Four Equal Tranches
Class of Stock [Line Items]                      
Common stock, shares authorized 550,000,000 550,000,000 550,000,000                
Common stock, par value $ 0.01 $ 0.01 $ 0.01                
Undesignated preferred stock, shares authorized 10,000,000 10,000,000                  
Undesignated preferred stock, par value $ 0.01 $ 0.01 $ 0.01                
Common stock, shares issued 394,036,984 394,036,984 369,391,972                
Common stock, shares outstanding 394,036,984 394,036,984 369,391,972                
Common stock loaned under share lending agreement, shares 9,000,000 9,000,000 9,000,000                
Senior notes, effective interest rate       5.75%   5.75%         9.75%
Undesignated preferred stock, shares outstanding 0 0 0                
Principal amount       $ 100,000,000 $ 100,000,000 $ 100,000,000       $ 120,000,000 $ 160,000,000
Nominal lending fee $ 0.01                    
Maximum sales amount under the agreement                     160,000,000
Number of equal tranches                 4    
Debt facility periodic principal amount                     40,000,000
Aggregate principal amount of convertible notes             0 60,000,000      
Common shares issuable upon conversion               12,000,000      
Conversion price of shares           $ 6.80   $ 5.00      
Amount of common shares issued upon conversion $ 93,500,000 $ 100,000,000         $ 100,000,000