Stock-Based Compensation - Early Exercise Of Stock Options (Details)	9 Months Ended
Sep. 30, 2021 shares
Stock-Based Compensation
Early exercised stock options, Unvested balance at beginning of period	182
Vested	(118)
Early exercised stock options, Unvested balance at end of period	64

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration