Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets
Cash	$ 1,179	$ 176
Prepaid expenses	1,235	2,132
Total current assets	2,414	2,308
Other assets	1,053	1,205
Total assets	3,467	3,513
Current liabilities
Accounts payable	4,117	4,372
Upfront payment for license agreement	0	100
Accrued expenses	2,258	1,523
Contract liabilities, current portion	112	0
Notes payable, net of deferred financing costs	3,140	565
Convertible notes, current portion	0	4,179
Liability classified warrants	303	2,307
Total current liabilities	9,930	13,046
Notes payable, net of deferred financing costs	0	4,143
Contract liabilities, net of current portion	438	0
Convertible notes, net of current portion	0	194
Total liabilities	10,368	17,383
Commitments and contingencies (Note 10)
Stockholders' deficit
Preferred stock - $0.0001 par value per share; 10,000,000 shares authorized at June 30, 2024 and December 31, 2023; no shares issued and outstanding at June 30, 2024 and December 31, 2023	0	0
Common stock - $0.0001 par value per share; 500,000,000 shares authorized; 3,221,104 and 1,904,611 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively	1	1
Additional paid-in capital	123,765	100,863
Accumulated deficit	(130,667)	(114,734)
Total stockholders' deficit	(6,901)	(13,870)
Total liabilities, convertible preferred stock and stockholders' deficit	$ 3,467	$ 3,513