Convertible Preferred Stock and Stockholders' Equity (Deficit) - Summary of Unvested Shares and Unvested Stock Liabilities (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($) shares
Number of Unvested Shares
Number of Unvested Shares, Beginning balance | shares	211,137
Early exercised shares | shares	521,896
Vested shares | shares	(293,486)
Number of Unvested Shares, Ending balance | shares	439,547
Unvested Stock Liabilities
Unvested Stock Liabilities, Beginning balance | $	$ 52
Early exercised shares | $	1,626
Vested shares | $	(326)
Unvested Stock Liabilities, Ending balance | $	$ 1,352