Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Financial Assets Measured at Fair Value on Recurring Basis (Details)

v3.20.1
Fair Value Measurements - Financial Assets Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Cash equivalents:    
Total $ 131,003 $ 136,204
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Cash equivalents:    
Total 131,003 136,204
Money Market Funds    
Cash equivalents:    
Total 131,003 136,204
Money Market Funds | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Cash equivalents:    
Total $ 131,003 $ 136,204