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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2013
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES  
Schedule of useful lives of property and equipment

 

Furniture and office equipment   3 - 5 years
Laboratory equipment   3 - 5 years
Leasehold improvements   Shorter of estimated useful life or lease term
Schedule of calculation of basic and diluted earnings per share

 

(in thousands, except for per share amounts)
  2013   2012   2011  

Numerator:

                    

Net income (loss)

   $ 43,313   $ (29,781 ) $ 70,726  
               
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Denominator for basic net income (loss) per share

     56,736     55,893     54,563  
               
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Net effect of dilutive common shares

     —     —     1,527  
               
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Denominator for diluted net income (loss) per share:

     57,544     55,893     56,090  
               
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Basic net income (loss) per share

   $ 0.76   $ (0.53 ) $ 1.30  
               
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Diluted net income (loss) per share

   $ 0.75   $ (0.53 ) $ 1.26  
               
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