Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 3,910	$ 9,737
Short-term investments	20,053	39,360
Prepaid expenses and other current assets	2,104	2,601
Total current assets	26,067	51,698
Restricted cash	936	936
Property and equipment, net	3,791	4,476
Right-of-use assets	10,075	10,560
Other long-term assets	21	49
Total assets	40,890	67,719
Current liabilities:
Accounts payable	721	1,166
Accrued expenses	3,068	5,283
Lease liabilities, current portion	1,309	1,218
Total current liabilities	5,098	7,667
Lease liabilities, net of current portion	11,889	12,567
Warrant liabilities	840	787
Total liabilities	17,827	21,021
Commitments and Contingencies (Note 7)
Stockholders’ equity:
Preferred stock, $0.0001 par value; 1,000,000 shares authorized; no shares issued or outstanding at June 30, 2025 and December 31, 2024
Additional paid-in capital	247,590	242,566
Accumulated other comprehensive income		50
Accumulated deficit	(224,544)	(195,935)
Total stockholders’ equity	23,063	46,698
Total liabilities and stockholders’ equity	40,890	67,719
Class A Common Stock
Stockholders’ equity:
Common stock, value	15	15
Class B Common Stock
Stockholders’ equity:
Common stock, value	$ 2	$ 2

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).