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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2020
Fair Value Disclosures [Abstract]  
Summary of Placement in the Fair Value Hierarchy of Financial Assets that are Measured at Fair Value on a Recurring Basis
The following table presents the placement in the fair value hierarchy of financial assets that are measured at fair value on a recurring basis, including the items for which the fair value option has been elected, as of June 30, 2020:
Quoted Prices in Active Markets
(Level 1)
Significant Other Observable Inputs
(Level 2)
Significant Unobservable Inputs
(Level 3)
June 30,
2020
Assets
U.S. government debt securities$—  $86,028  $—  $86,028  
Other—  264  —  264  
Total$—  $86,292  $—  $86,292  
The following table presents the placement in the fair value hierarchy of financial assets that are measured at fair value on a recurring basis, including the items for which the fair value option has been elected, as of December 31, 2019:
Quoted Prices in Active Markets
(Level 1)
Significant Other Observable Inputs
(Level 2)
Significant Unobservable Inputs
(Level 3)
December 31,
2019
Assets
U.S. government debt securities$—  $8,996  $—  $8,996  
Other—  264  —  264  
Total$—  $9,260  $—  $9,260  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation The changes in the fair value of the Level 3 liability during the six months ended June 30, 2020 were as follows:
Balance at December 31, 2019$585  
Change in fair value of contingent consideration recognized in selling, general and administrative expenses(585) 
Balance at June 30, 2020$—