XML 25 R5.htm IDEA: XBRL DOCUMENT v3.8.0.1
Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid in Capital
Accumulated Other Comprehensive (Loss) Gain
Accumulated Deficit
Beginning balance at Dec. 31, 2014 $ 208,699 $ 76 $ 1,035,205 $ (277) $ (826,305)
Beginning balance (in shares) at Dec. 31, 2014   76,466      
Net loss (88,929) $ 0 0 0 (88,929)
Unrealized gains (losses) on investments (700) 0 0 (700) 0
Share-based compensation 28,392 0 28,392 0 0
Issuance of common stock for restricted share units vested 1 $ 1 0 0 0
Issuance of common stock for restricted share units vested (in shares)   503      
Issuance of common stock for option exercises $ 6,304 $ 1 6,303 0 0
Issuance of common stock for option exercises (in shares) 1,315 1,308      
Issuance of common stock, net of offering costs $ 270,687 $ 8 270,679 0 0
Issuance of common stock, net of offering costs (in shares)   7,986      
Ending balance at Dec. 31, 2015 424,454 $ 86 1,340,579 (977) (915,234)
Ending balance (in shares) at Dec. 31, 2015   86,263      
Net loss (141,090) $ 0 0 0 (141,090)
Unrealized gains (losses) on investments 659 0 0 659 0
Share-based compensation 28,464 0 28,464 0 0
Issuance of common stock for restricted share units vested 0 $ 0 0 0 0
Issuance of common stock for restricted share units vested (in shares)   284      
Issuance of common stock for option exercises $ 2,390 $ 1 2,389 0 0
Issuance of common stock for option exercises (in shares) 341 336      
Ending balance at Dec. 31, 2016 $ 314,877 $ 87 1,371,432 (318) (1,056,324)
Ending balance (in shares) at Dec. 31, 2016   86,883      
Net loss (142,542) $ 0 0 0 (142,542)
Unrealized gains (losses) on investments (1,532) 0 0 (1,532) 0
Share-based compensation 42,522 0 42,522 0 0
Issuance of common stock for restricted share units vested 1 $ 1 0 0 0
Issuance of common stock for restricted share units vested (in shares)   562      
Issuance of common stock for option exercises $ 13,864 $ 1 13,863 0 0
Issuance of common stock for option exercises (in shares) 1,353 1,349      
Equity component of convertible debt, net of issuance costs $ 144,948 $ 0 144,948 0 0
Ending balance at Dec. 31, 2017 $ 372,138 $ 89 $ 1,572,765 $ (1,850) $ (1,198,866)
Ending balance (in shares) at Dec. 31, 2017   88,794