Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

Schedule of Weighted Average Values of Contingent Purchase Milestones and Credit Spread

The significant unobservable inputs include the anticipated timelines to achieve the contingent purchase milestones and our estimated credit spread, the weighted average values of which (weighted based on the value of each contingent liability), are shown in the table below.

	September 30, 2021			December 31, 2020
Period of time to achieve milestones (in years)		2.3			1.3
Credit spread		4.9	%		5.5	%

Schedule of Liabilities Measured at Fair Value

Liabilities measured at fair value are summarized below (in thousands):

Description	September 30, 2021		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Liabilities:
Contingent purchase price considerations	$	3,739	$	—	$	—	$	3,739
Total	$	3,739	$	—	$	—	$	3,739

Description	December 31, 2020		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Liabilities:
Contingent purchase price consideration	$	10,208	$	—	$	—	$	10,208
Total	$	10,208	$	—	$	—	$	10,208

Schedule of Liabilities Measured at Fair Value Using Significant Unobservable Inputs

The following table presents our liabilities measured at fair value using significant unobservable inputs (Level 3), as of September 30, 2021 (in thousands):

Balance, December 31, 2020	$	10,208
Change in fair value of contingent purchase price considerations during the period		13,531
Achievement of 4-AB contingent milestones		(20,000	)
Balance, September 30, 2021	$	3,739