Quarterly report pursuant to Section 13 or 15(d)

Short-term Investments (Details)

v3.20.2
Short-term Investments (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Schedule of Held-to-maturity Securities [Line Items]  
Amortized Cost $ 6,494
Unrealized Gains 15
Unrealized Losses (14)
Fair Value 6,495
Commercial paper  
Schedule of Held-to-maturity Securities [Line Items]  
Amortized Cost 998
Unrealized Gains 0
Unrealized Losses 0
Fair Value 998
Overnight repurchase agreement  
Schedule of Held-to-maturity Securities [Line Items]  
Amortized Cost 3,500
Unrealized Gains 0
Unrealized Losses 0
Fair Value 3,500
U.S. government securities  
Schedule of Held-to-maturity Securities [Line Items]  
Amortized Cost 1,996
Unrealized Gains 15
Unrealized Losses (14)
Fair Value $ 1,997