Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Fair Value Measurements

The fair value measurements of the Company's assets as of September 30, 2021 and December 31, 2020 are summarized as follows:

	Fair Value Measurements as of September 30, 2021
	Level I		Level II		Level III		Total
Cash and cash equivalents	$	289,486	$	—	$	—	$	289,486
Restricted cash	698		—		—		698
Held-to-maturity investments:
Commercial paper	—		93,453		—		93,453
State and municipal bonds	—		17,799		—		17,799
Corporate bonds and notes	—		187,942		—		187,942
Total assets	$	290,184	$	299,194	$	—	$	589,378
	Fair Value Measurements as of December 31, 2020
	Level I		Level II		Level III		Total
Cash and cash equivalents	$	389,705	$	—	$	—	$	389,705
Held-to-maturity investments:
Treasury securities	—		149,995		—		149,995
Commercial paper	—		37,948		—		37,948
Corporate bonds and notes	—		49,829		—		49,829
Total assets	$	389,705	$	237,772	$	—	$	627,477