Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
CURRENT ASSETS:
Cash and cash equivalents	$ 30,421	$ 79,398
Prepaid expenses and other current assets	4,090	4,248
Total current assets	34,511	83,646
Security deposits	252	253
Operating lease right-of-use asset	2,579	2,792
TOTAL ASSETS	37,342	86,691
CURRENT LIABILITIES:
Current portion of operating lease liabilities	447	406
Accounts payable	4,861	4,433
Accrued expenses and other current liabilities	10,668	16,143
Warrant liabilities	1,773	6,314
Total current liabilities	17,749	27,296
NONCURRENT LIABILITIES:
Noncurrent portion of operating lease liabilities	2,155	2,389
Total noncurrent liabilities	2,155	2,389
Total liabilities	19,904	29,685
STOCKHOLDERS' EQUITY:
Common stock, $0.0001 par value; 250,000,000 shares authorized as of June 30, 2025 and December 31, 2024; 141,938,335 shares issued and outstanding as of June 30, 2025 and 137,228,741 shares issued and outstanding as of December 31, 2024	35	35
Preferred stock, par value $0.0001; 10,000,000 shares authorized as of June 30, 2025 and December 31, 2024; 0 shares issued and outstanding as of June 30, 2025 and December 31, 2024
Additional paid-in capital	634,768	631,181
Accumulated deficit	(617,365)	(574,210)
Total stockholders' equity	17,438	57,006
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 37,342	$ 86,691