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Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 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:

 June 30, 2022December 31, 2021
  Fair Value Measurement Category Fair Value Measurement Category
(In thousands)TotalLevel 1Level 2Level 3TotalLevel 1Level 2Level 3
Assets:
Money market funds$1,135 $1,135 $— $— $1,258 $1,258 $— $— 
Commercial paper (a)
15,708 — 15,708 — 18,229 — 18,229 — 
Corporate notes52,648 — 52,648 — 50,524 — 50,524 — 
$69,491 $1,135 $68,356 $— $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.