Investments in Non-Marketable Equity Securities	9 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Investments in Non-Marketable Equity Securities	Investments in Non-Marketable Equity SecuritiesThe Company’s non-marketable equity securities are investments in privately held companies without readily determinable fair values. The carrying value of the Company’s investments without readily determinable fair values was $55.6 million as of September 30, 2021 and is classified within “Investments in non-marketable equity securities” in our consolidated balance sheets. The Company did not have any investments without readily determinable fair value as of December 31, 2020. The Company did not record any adjustments to the carrying value of its non-marketable equity securities accounted for under the measurement alternative, and did not recognize any gains or losses related to the sale of non-marketable equity securities in the three and nine months ended September 30, 2021.