Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 5,386	$ 8,708
Short-term investments	12,393	17,602
Prepaid expenses and other current assets	1,503	1,704
Total current assets	19,282	28,014
Property and equipment, net	244	241
Operating lease right-of-use assets	68	111
Other assets	567	711
Total assets	20,161	29,077
Current liabilities:
Accounts payable	1,136	1,486
Accrued expenses	1,982	3,368
Current term loans, net	19,299	19,061
Accrued final payment on term loans, current	1,100	1,100
Lease liabilities, current portion	71	60
Total current liabilities	23,588	25,075
Earn-out liability	0	6
Other accrued liabilities, non-current	493	0
Non-current warrant liability	40	40
Operating lease liabilities, non-current	6	60
Total liabilities	24,127	25,181
Commitments and contingencies
Stockholders' equity (deficit):
Preferred stock, $0.0001 par value; 100,000,000 shares authorized at September 30, 2023 and December 31, 2022; zero shares issued and outstanding as of September 30, 2023 and December 31, 2022	0	0
Common stock, $0.0001 par value; 1,000,000,000 shares authorized at September 30, 2023 and December 31, 2022; 62,794,656 shares issued and 62,794,656 shares issued and outstanding as of September 30, 2023; 41,990,383 shares issued and 41,690,383 shares issued and outstanding as of December 31, 2022	6	4
Additional paid-in capital	166,276	147,476
Accumulated other comprehensive loss	(1)	(18)
Accumulated deficit	(170,247)	(143,566)
Total stockholders' equity (deficit)	(3,966)	3,896
Total liabilities and stockholders' equity (deficit)	$ 20,161	$ 29,077