BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 241,126	$ 78,446
Short-term investments, available-for-sale	48,393	215,154
Prepaid expenses and other current assets	3,330	3,097
Total current assets	292,849	296,697
Investments, available-for-sale	6,956
Property and equipment, net	1,825	1,981
Other assets	12,550	319
Total assets	314,180	298,997
Current liabilities:
Accounts payable	419	757
Accrued liabilities	11,484	8,245
Total current liabilities	11,903	9,002
Other long-term liabilities	10,741	219
Total liabilities	22,644	9,221
Commitments and contingencies (Note 9)
Stockholders' equity:
Preferred stock, $0.0001 par value; 200,000,000 shares authorized; no shares issued and outstanding at September 30, 2021 and December 31, 2020
Common stock, $0.0001 par value; 1,000,000,000 shares authorized; 39,331,585 and 36,672,415 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	4	4
Additional paid-in capital	513,871	456,196
Accumulated deficit	(222,337)	(166,393)
Accumulated other comprehensive loss	(2)	(31)
Total stockholders' equity	291,536	289,776
Total liabilities and stockholders' equity	$ 314,180	$ 298,997

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).