XML 63 R53.htm IDEA: XBRL DOCUMENT v3.8.0.1
Share-Based Compensation - 2017 Equity Incentive Plan and Employee Share Purchase Plan (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Jan. 31, 2017
Dec. 31, 2016
Share-Based Compensation              
Stock option granted         0    
Share-based compensation expense   $ 6,256 $ 744 $ 10,805 $ 2,167    
2014 Equity Incentive Plan              
Share-Based Compensation              
Shares authorized   4,899,230   4,899,230   4,899,230 4,000,000
Number of shares remained available for future grant 372 0   0     1,034,805
2017 Equity Incentive Plan              
Share-Based Compensation              
Shares authorized 2,713,113            
Number of shares remained available for future grant   2,369,319   2,369,319      
2017 Equity Incentive Plan | Employees and directors              
Share-Based Compensation              
Vesting period (in years)       3 years      
Stock option granted       1,225,450 0    
Share-based compensation expense   $ 5,810 484 $ 7,710 $ 1,379    
2017 Equity Incentive Plan | Non-employees              
Share-Based Compensation              
Vesting period (in years)       3 years      
Stock option granted       137,537 0    
Share-based compensation expense   $ 446 $ 260 $ 3,095 $ 788    
2017 Employee Share Purchase Plan              
Share-Based Compensation              
Number of shares reserved for issuance 339,139            
Threshold limit of common shares for issuance 600,000            
Threshold percentage of number of common stock outstanding 1.00%