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Fair Value Measurement (Tables)
9 Months Ended
Sep. 30, 2021
Fair Value Disclosures [Abstract]  
Schedule of Marketable Securities Measured at Fair Value on Recurring Basis
The table below summarizes the fair value of the Company’s marketable securities measured at fair value on a recurring basis based on the three-tier fair value hierarchy:
September 30, 2021
Level 1Level 2Level 3Total
(in thousands)
Marketable securities
Money market funds
$54,218 $— $— $54,218 
U.S. treasury securities52,143 — — 52,143 
Corporate bonds— 15,370 — 15,370 
Commercial paper— 33,475 — 33,475 
Total marketable securities$106,361 $48,845 $— $155,206 
December 31, 2020
Level 1Level 2Level 3Total
(in thousands)
Marketable securities
Money market funds
$45,948 $— $— $45,948 
U.S. treasury securities74,776 — — 74,776 
Corporate bonds— 8,938 — 8,938 
Commercial paper— 60,537 — 60,537 
Total marketable securities$120,724 $69,475 $— $190,199