Condensed Balance Sheet - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 86,191	$ 53,654
Restricted cash, current		50
Prepaid expenses and other current assets	3,569	557
Total current assets	89,760	54,261
Restricted cash, noncurrent	293	293
Non-marketable equity securities	1,114
Total assets	91,167	54,554
Current liabilities:
Accounts payable	964	909
Restructuring liability, current	367	962
Accrued expenses and other current liabilities	2,711	535
Total current liabilities	4,042	2,406
Restructuring liability, noncurrent	1,362	1,634
Accrued and other noncurrent liabilities	286	286
Total liabilities	5,690	4,326
Commitments and contingencies (Note 12)
Redeemable convertible preferred stock, $0.001 par value; 0 and 182,772,372 shares authorized, issued and outstanding as of September 30, 2021 and December 31, 2020, respectively		139,576
Stockholders' equity (deficit)
Additional paid-in capital	192,665	2,099
Accumulated deficit	(107,209)	(91,447)
Total stockholders' equity (deficit)	85,477	(89,348)
Total liabilities, redeemable convertible preferred stock, and stockholders' equity (deficit)	91,167	54,554
Common Class A [Member]
Stockholders' equity (deficit)
Common Stock	21
Total stockholders' equity (deficit)
Common Class B Non Voting [Member]
Stockholders' equity (deficit)
Common Stock	$ 0	$ 0

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).