BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 31,828	$ 218,309
Marketable securities	259,405
Prepaid expenses and other current assets	3,882	2,500
Total current assets	295,115	220,809
Restricted cash	4,044
Property and equipment, net	3,929	2,480
Right-of-use asset	1,707
Other assets	303	301
Total assets	305,098	223,590
Current liabilities:
Accounts payable	7,840	3,920
Accrued expenses and other current liabilities	9,621	7,455
Operating lease liability	1,740
Total current liabilities	19,201	11,375
Other liabilities		32
Total liabilities	19,201	11,407
Commitments (note 8)
Stockholders’ equity:
Additional paid-in capital	505,723	319,605
Accumulated other comprehensive income (loss)	(711)
Accumulated deficit	(219,120)	(107,426)
Total stockholders’ equity	285,897	212,183
Total liabilities and stockholders’ equity	305,098	223,590
Voting Common Stock
Stockholders’ equity:
Common stock	4	3
Non-voting Common Stock
Stockholders’ equity:
Common stock	$ 1	$ 1

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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- 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).