Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Fair value assumptions (Details)

v3.20.2
Stock-Based Compensation - Fair value assumptions (Details) - $ / shares
6 Months Ended
May 20, 2020
Jun. 30, 2020
Feb. 29, 2020
Sep. 26, 2019
Stock-Based Compensation        
Authorized shares   4,020,516    
Available for grant (in shares)   289,373    
Terms of award 10 years      
Vesting period 4 years      
Fair value of grants per share     $ 32.00 $ 8.25
2020 Incentive Award Plan        
Stock-Based Compensation        
Authorized shares 911,000      
Percentage of increase in common stock available for grant 4.00%      
2017 Stock Plan        
Stock-Based Compensation        
Available for grant (in shares) 231,941      
Employee Stock Purchase Plan 2020        
Stock-Based Compensation        
Authorized shares 100,000      
Percentage of increase in common stock available for grant 1.00%      
Maximum number of shares issued or transferred under ESPP 500,000      
Purchase price, as a percent of fair market value 85.00%      
Shares issued under ESPP   0    
Options        
Stock-Based Compensation        
Expected stock price volatility, minimum (as a percent)   78.25%    
Expected stock price volatility, maximum (as a percent)   86.06%    
Risk-free rate of interest, minimum (as a percent)   0.36%    
Risk-free rate of interest, maximum (as a percent)   2.38%    
Expected dividend yield (as a percent)   0.00%    
Options | Minimum        
Stock-Based Compensation        
Exercise price per share (in dollars per share)   $ 13.60    
Fair value of grants per share   $ 9.04    
Expected Term (years)   4 years 8 months 12 days    
Options | Maximum        
Stock-Based Compensation        
Exercise price per share (in dollars per share)   $ 56.97    
Fair value of grants per share   $ 42.71    
Expected Term (years)   7 years