Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2021

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 as of December 31, 2021:

	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		December 31, 2021
Assets
United States government debt securities	$	—	$	120,705	$	—	$	120,705
Certificates of deposit	—		97		—		97
Total	$	—	$	120,802	$	—	$	120,802

The following table presents the placement in the fair value hierarchy of financial assets that are measured at fair value on a recurring basis as of December 31, 2020:

	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		December 31, 2020
Assets
United States government debt securities	$	—	$	48,061	$	—	$	48,061
Certificates of deposit	—		264		—		264
Total	$	—	$	48,325	$	—	$	48,325

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

The changes in the fair value of the Level 3 liability during the year ended December 21, 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 December 31, 2020	$	—