XML 18 R6.htm IDEA: XBRL DOCUMENT v3.7.0.1
CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Accumulated Other Comprehensive Income
Convertible Senior Notes Due 2019
Convertible Senior Notes Due 2019
Additional Paid-In Capital
Convertible Senior Notes Due 2022
Convertible Senior Notes Due 2022
Additional Paid-In Capital
Increase (Decrease) in Stockholders' Equity                  
Cumulative effect adjustment of the adoption of Accounting Standards Update 2016-09 (Note 2)     $ 287 $ (287)          
Balances (in shares) at Dec. 31, 2016   37,481,000              
Balances at Dec. 31, 2016 $ 218,976 $ 37 565,207 (346,238) $ (30)        
Increase (Decrease) in Stockholders' Equity                  
Exercise of stock options (in shares)   214,000              
Exercise of stock options 2,613   2,613            
Vested restricted stock units (in shares)   97,000              
Vested restricted stock units $ 0 $ 0              
Shares issued under employee stock purchase plan (in shares) 35,745 36,000              
Shares issued under employee stock purchase plan $ 1,056   1,056            
Stock-based compensation 14,744   14,744            
Issuance of common stock upon conversion of 2019 convertible senior notes (in shares)   2,490,000              
Issuance of common stock upon conversion of 2019 convertible senior notes 120,960 $ 3 120,957            
Retirement of equity component of 2019 convertible senior notes 70,930         $ (126,326) $ (126,326) $ 68,668 $ 68,668
Net unrealized gain (loss) on investments (34)       (34)        
Net loss (39,609)     (39,609)          
Balances (in shares) at Jun. 30, 2017   40,318,000              
Balances at Jun. 30, 2017 $ 261,048 $ 40 $ 647,206 $ (386,134) $ (64)