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Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2020
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]  
Fair Value, Assets Measured on Recurring Basis
Assets and liabilities measured at fair value on a recurring basis as of December 31, 2020 and 2019 are summarized below:
As of December 31, 2020
Level 1Level 2Level 3Total
Earn-out liability$— $— $6,865 $6,865 
As of December 31, 2019
Level 1Level 2Level 3Total
Earn-out liability$— $— $11,770 $11,770 
Fair Value Measurements, Nonrecurring The losses on assets measured at fair value on a nonrecurring, discontinued operation basis are summarized below:
20202019
Goodwill impairment charge1
$5,406 $— 
Valuation allowance on assets held for sale1
22,978 — 
1 See Note 2, Discontinued Operation and Held for Sale.