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Fair Value Measurements
 6 Months Ended
Jun. 30, 2020
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
The following tables present the financial instruments that were measured at fair value on a recurring basis at June 30, 2020 and December 31, 2019 by level within the fair value hierarchy (in thousands):
 June 30, 2020
 Level 1Level 2Level 3Total
Money market funds $58,482  $—  $—  $58,482  

 December 31, 2019
 Level 1Level 2Level 3Total
Money market funds$71,248  $—  $—  $71,248