Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 2,140	$ 1,241
Short-term investments	2,523
Prepaid research and development	259	274
Prepaid expenses and other current assets	79	79
Total current assets	5,001	1,594
Property, plant and equipment, net	39	49
Right-of-use assets, net	135	147
Deferred financing costs	544	610
Other long-term assets	62
Total assets	5,781	2,400
Current liabilities:
Accounts payable	372	682
Accrued and other current liabilities	1,476	582
Operating lease liability, current	119	99
Total current liabilities	1,967	1,363
Operating lease liability, net of current portion	18	48
Total liabilities	1,985	1,411
Commitments and contingencies (Note 7)
Series E convertible preferred stock, par value $0.01 per share, 5,000 shares authorized; 0 and 4,180 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively		4,180
Stockholders’ equity (deficit):
Common stock, par value $0.01 per share, 60,000,000 shares authorized; 13,882,060 and 12,174,467 issued and outstanding at June 30, 2023 and December 31, 2022, respectively	139	122
Additional paid-in capital	92,172	79,698
Accumulated deficit	(88,515)	(83,011)
Total stockholders’ equity (deficit)	3,796	(3,191)
Total liabilities and stockholders’ equity (deficit)	$ 5,781	$ 2,400