Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 100,905	$ 19,838
Other receivables		600
Prepaid expenses and other current assets	1,502	247
Total current assets	102,407	20,685
Property and equipment, net	3,278	693
Operating lease right-of-use assets	1,183	1,336
Restricted cash	345	345
Other non-current assets		298
Total assets	107,213	23,357
Current liabilities:
Accounts payable	2,247	1,417
Current portion of operating lease liabilities	490
Accrued expenses and other current liabilities	6,422	2,595
Total current liabilities	9,159	4,012
Derivative tranche liability		8,158
Non-current portion of operating lease liabilities	2,512	1,624
Common stock warrant liability	7,400
Earnout liability	8,794
Other non-current liabilities	746	853
Total liabilities	28,611	14,647
Commitments and contingencies (Note 9)
Redeemable convertible preferred stock: $0.0001 par value — none and 19,522,771 shares authorized at September 30, 2021 and December 31, 2020, respectively; none and 15,480,195 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively; liquidation value $41,165 December 31, 2020		43,840
Stockholders’ equity (deficit)
Preferred stock: $0.0001 par value — 10,000,000 shares and none authorized at September 30, 2021 and December 31, 2020, respectively; none issued and outstanding at September 30, 2021 and December 31, 2020
Common stock: $0.0001 par value — 492,000,000 and 50,218,502 shares authorized at September 30, 2021 and December 31, 2020, respectively; 37,816,310 and 2,770,702 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	4	1
Additional paid-in capital	136,991	1,682
Accumulated deficit	(58,393)	(36,813)
Total stockholders’ equity (deficit)	78,602	(35,130)
Total liabilities, redeemable convertible preferred stock and stockholders’ equity (deficit)	$ 107,213	$ 23,357