Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Summary of valuation of the Company's investments and financial instruments that are measured at fair value on a recurring basis

The following table summarizes the valuation of the Company’s financial instruments that are measured at fair value on a recurring basis:

	March 31, 2022								December 31, 2021
			Fair value measurement category								Fair value measurement category
(In thousands)	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Assets:
Money market funds	$	1,884	$	1,884	$	—	$	—	$	1,258	$	1,258	$	—	$	—
Commercial paper (a)	15,203		—		15,203		—		18,229		—		18,229		—
Corporate notes	52,488		—		52,488		—		50,524		—		50,524		—
	$	69,575	$	1,884	$	67,691	$	—	$	70,011	$	1,258	$	68,753	$	—

(a) Approximately $8.0 million of commercial paper had an original maturity of 90 days or less and was recorded as a cash equivalent as of December 31, 2021.