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Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2022
Fair Value Disclosures [Abstract]  
Financial Assets Measured at Fair Value on a Recurring Basis
Financial assets measured at fair value on a recurring basis were as follows (in thousands):
Fair Value Measurements at March 31, 2022
TotalLevel 1Level 2
Assets:
Money market funds$352 $352 $— 
U.S. Treasury securities127,956 127,956 — 
Government-sponsored enterprises7,700 — 7,700 
Corporate debt securities6,999 — 6,999 
Total assets measured at fair value(a)
$143,007 $128,308 $14,699 
Fair Value Measurements at December 31, 2021
TotalLevel 1Level 2
Assets:
Money market funds$17,202 $17,202 $— 
U.S. Treasury securities81,132 81,132 — 
Government-sponsored enterprises7,734 — 7,734 
Corporate debt securities37,280 — 37,280 
Total assets measured at fair value(b)
$143,348 $98,334 $45,014 
(a) Total assets measured at fair value at March 31, 2022 includes approximately $6.3 million reported in cash and cash equivalents on the consolidated balance sheet.
(b) Total assets measured at fair value at December 31, 2021 includes approximately $23.2 million reported in cash and cash equivalents on the consolidated balance sheet.