CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 108,064	$ 103,275
Marketable securities	140,670	212,086
Prepaid expenses and other current assets	11,076	12,663
Total current assets	259,810	328,024
Property and equipment, net	5,991	7,384
Operating lease right-of-use asset	14,885	18,543
Restricted cash	2,612	2,498
Other long-term assets	1,602	1,719
Total assets	284,900	358,168
Current liabilities:
Accounts payable	3,044	3,994
Accrued expenses	13,805	24,321
Operating lease liability	7,280	7,852
Other current liabilities	141	222
Total current liabilities	24,270	36,389
Long-term portion of operating lease liability	8,228	11,800
Long-term debt	49,901	49,744
Total liabilities	82,399	97,933
Commitments and contingencies (Note 8)
Stockholders' equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized at June 30, 2023 and December 31, 2022; no shares issued and outstanding at June 30, 2023 and December 31, 2022
Common stock, $0.001 par value; 150,000,000 shares authorized; 55,159,787 and 51,672,579 shares issued and outstanding as of June 30, 2023 and December 31, 2022, respectively	55	52
Additional paid-in capital	790,445	771,699
Accumulated other comprehensive loss	(63)	(884)
Accumulated deficit	(587,936)	(510,632)
Total stockholders' equity	202,501	260,235
Total liabilities and stockholders' equity	$ 284,900	$ 358,168

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).

Name:	us-gaap_AccountsPayableCurrent
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).