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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Assets and Liabilities Measured at Fair Value
The following tables present information about the Company's assets and liabilities measured at fair value on a recurring basis in the consolidated balance sheets (in thousands):
 
DescriptionDecember 31, 2021Quoted Prices In 
Active Markets
(Level 1)
Significant Other
Observable 
Inputs (Level 2)
Unobservable 
Inputs
(Level 3)
Assets:
Cash equivalents$21,000 $21,000 $— $— 
Restricted cash equivalents100 100 — — 
Total assets measured and recorded at fair value$21,100 $21,100 $— $— 
Liabilities:
Warrants potentially settleable in cash$40 $— $— $40 
Contingent consideration296 — — 296 
Total liabilities measured and recorded at fair value$336 $— $— $336 
DescriptionDecember 31, 2020Quoted Prices In 
Active Markets
(Level 1)
Significant Other
Observable 
Inputs (Level 2)
Unobservable 
Inputs
(Level 3)
Assets:
Cash equivalents$34,959 $34,959 $— $— 
Restricted cash equivalents$100 $100 
Total assets measured and recorded at fair value$35,059 $35,059 $— $— 
Liabilities:
Warrants potentially settleable in cash$55 $— $— $55 
Contingent consideration4,633 — — 4,633 
Total liabilities measured and recorded at fair value$4,688 $— $— $4,688 
Reconciliation of Level 3 Liabilities A reconciliation of the change in the fair value of the contingent consideration liability for the year ended December 31, 2021 and 2020 is as follows (in thousands):
 Fair Value
Measurements
Using Significant
Unobservable
Inputs
(Level 3)
Contingent consideration, December 31, 2019$4,912 
Change in the estimated fair value of the contingent consideration(279)
Contingent consideration, December 31, 20204,633 
Change in the estimated fair value of the contingent consideration(4,337)
Contingent consideration, December 31, 2021$296 
Schedule of Fair Value Measurement Inputs and Valuation Techniques
The following significant unobservable inputs were used in the valuation of the contingent consideration liability:

Unobservable inputAs of December 31, 2021As of December 31, 2020
Potential milestone payments
$0 - $30 million
$0 - $30 million
Discount rate15.5 %6.6 %
Cumulative probability of success5.3 %33.0 %
Projected years of payments
2028 - 2031
2026 - 2029