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Consolidated Statement of Changes in Stockholders' Equity - USD ($)
$ in Thousands
$0.001 Par Value Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Loss [Member]
Noncontrolling Interest in Subsidiary [Member]
Retained Earnings [Member]
Total
Balance at Dec. 31, 2013 $ 37 $ 247,637 $ (6,119) $ (3,465) $ (453) $ 251,528 $ 489,165
Balance (in shares) at Dec. 31, 2013 37,036,996   (412,953)        
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Employee equity award plans activity $ 1 26,585   0 0 0 26,586
Employee equity award plans activity (in shares) 1,092,876            
Non-cash development expenses from joint venture         453 0 453
Treasury stock     $ (201) 0 0   (201)
Treasury stock (in shares)     (7,236)        
Net income         0 36,741 36,741
Foreign currency translations, net of tax       457 0 0 457
Balance at Dec. 31, 2014 $ 38 274,222 $ (6,320) (3,008) 0 288,269 553,201
Balance (in shares) at Dec. 31, 2014 38,129,872   (420,189)        
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Employee equity award plans activity $ 2 43,749   0 0 0 43,751
Employee equity award plans activity (in shares) 1,699,536            
Treasury stock     $ (100) 0 0   (100)
Treasury stock (in shares)     (2,641)        
Net income       0 0 62,870 62,870
Foreign currency translations, net of tax       295 0 0 295
Balance at Dec. 31, 2015 $ 40 317,971 $ (6,420) (2,713) 0 351,139 $ 660,017
Balance (in shares) at Dec. 31, 2015 39,829,408   (422,830)       39,406,578
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Employee equity award plans activity $ 1 34,464   0 0 0 $ 34,465
Employee equity award plans activity (in shares) 1,167,482            
Separation of Aptevo           (148,435) (148,435)
Treasury stock     $ 0 0 0   0
Treasury stock (in shares)     0        
Net income       0 0 51,776 51,776
Foreign currency translations, net of tax       (1,618) 0 0 (1,618)
Balance at Dec. 31, 2016 $ 41 $ 352,435 $ (6,420) $ (4,331) $ 0 $ 254,480 $ 596,205
Balance (in shares) at Dec. 31, 2016 40,996,890   (422,830)       40,574,060