Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Short-term Investments

A summary of the fair value of our short-term investments as of September 30, 2021 and December 31, 2020 is shown in the tables below.

(In thousands)	September 30, 2021		Level 1		Level 2		Level 3
Certificates of deposit	$	45,030	$	—	$	45,030	$	—
U.S. government securities		—		—		—		—
Commercial paper		179,869		—		179,869		—
Total	$	224,899	$	—	$	224,899	$	—
(In thousands)	December 31, 2020		Level 1		Level 2		Level 3
Certificates of deposit	$	75,032	$	—	$	75,032	$	—
U.S. government securities		125,379		125,379		—		—
Commercial paper		129,863		—		129,863		—
Total	$	330,274	$	125,379	$	204,895	$	—