Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets
Cash	$ 5,019	$ 176
Prepaid expenses	1,518	2,132
Total current assets	6,537	2,308
Other assets	1,203	1,205
Total assets	7,740	3,513
Current liabilities
Accounts payable	3,879	4,372
Accrued expenses	1,544	1,523
Contingent upfront payment for license agreement	100	100
Notes payable, net of deferred financing costs	357	565
Convertible notes, current portion	1,135	4,179
Liability classified warrants	2,633	2,307
Total current liabilities	9,648	13,046
Notes payable, net of deferred financing costs	2,565	4,143
Convertible notes, net of current portion	0	194
Total liabilities	12,213	17,383
Commitments and contingencies (Note 9)
Stockholders' deficit
Preferred stock - $0.0001 par value, 10,000,000 shares authorized at March 31, 2024 and December 31, 2023; no shares issued and outstanding at March 31, 2024 and December 31, 2023	0	0
Common stock - $0.0001 par value per share; 500,000,000 shares authorized; 75,419,458 and 47,615,285 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively	8	5
Additional paid-in capital	122,950	100,859
Accumulated deficit	(127,431)	(114,734)
Total stockholders' deficit	(4,473)	(13,870)
Total liabilities and stockholders' deficit	$ 7,740	$ 3,513