Quarterly report pursuant to Section 13 or 15(d)

Cash, cash equivalents and investments - Cash Equivalents and Investments (Details)

v3.20.2
Cash, cash equivalents and investments - Cash Equivalents and Investments (Details)
$ in Thousands
 9 Months Ended
Sep. 30, 2020
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Amortized Cost $ 16,069
Unrealized gains 2
Unrealized losses (321)
Fair Value 15,750
U.S. treasuries  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Amortized Cost 9,215
Unrealized gains 0
Unrealized losses (216)
Fair Value $ 8,999
U.S. treasuries | Minimum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contractual maturity 48 days
U.S. treasuries | Maximum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contractual maturity 78 days
Corporate bonds  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Amortized Cost $ 6,854
Unrealized gains 2
Unrealized losses (105)
Fair Value $ 6,751
Corporate bonds | Minimum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contractual maturity 2 days
Corporate bonds | Maximum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contractual maturity 64 days