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
 6 Months Ended
Jun. 30, 2020
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Amortized Cost $ 32,881
Unrealized gains 72
Unrealized losses (41)
Fair Value 32,912
U.S. treasuries  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Amortized Cost 11,944
Unrealized gains 49
Unrealized losses 0
Fair Value $ 11,993
U.S. treasuries | Minimum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contractual maturity 44 days
U.S. treasuries | Maximum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contractual maturity 170 days
Asset-backed securities  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contractual maturity 77 days
Amortized Cost $ 1,567
Unrealized gains 3
Unrealized losses (1)
Fair Value 1,569
Corporate bonds  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Amortized Cost 19,370
Unrealized gains 20
Unrealized losses (40)
Fair Value $ 19,350
Corporate bonds | Minimum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contractual maturity 22 days
Corporate bonds | Maximum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contractual maturity 132 days