Stockholders' Equity - Summary of Unvested Shares and Unvested Stock Liability (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($) shares
Equity [Abstract]
Number of Unvested Shares, Beginning balance | shares	36,492
Number of Unvested Shares, Vested shares | shares	(28,262)
Number of Unvested Shares, Repurchased shares | shares	(2,695)
Number of Unvested Shares, Ending balance | shares	5,535
Unvested Stock Liability, Beginning balance | $	$ 27
Unvested Stock Liability, Vested shares | $	(20)
Unvested Stock Liability, Repurchased shares | $	(1)
Unvested Stock Liability, Ending balance | $	$ 6