Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Available-for-Sale Debt Securities in an Unrealized Loss Position (Details)

v3.20.2
Basis of Presentation and Summary of Significant Accounting Policies - Available-for-Sale Debt Securities in an Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Gross Unrealized Losses    
Less than 12 months $ (150) $ (19)
12 months or greater 0 0
Total (150) (19)
Estimated Fair Value    
Less than 12 months 46,037 137,947
12 months or greater 0 0
Total 46,037 137,947
Bank deposits    
Gross Unrealized Losses    
Less than 12 months (56) (3)
12 months or greater 0 0
Total (56) (3)
Estimated Fair Value    
Less than 12 months 30,015 58,584
12 months or greater 0 0
Total 30,015 58,584
Corporate bonds    
Gross Unrealized Losses    
Less than 12 months (94)  
12 months or greater 0  
Total (94)  
Estimated Fair Value    
Less than 12 months 16,022  
12 months or greater 0  
Total $ 16,022  
Commercial paper    
Gross Unrealized Losses    
Less than 12 months   (16)
12 months or greater   0
Total   (16)
Estimated Fair Value    
Less than 12 months   79,363
12 months or greater   0
Total   $ 79,363