Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 10,310	$ 8,708
Short-term investments	8,697	17,602
Prepaid expenses and other current assets	1,887	1,704
Total current assets	20,894	28,014
Property and equipment, net	214	241
Operating lease right-of-use assets	97	111
Other assets	723	711
Total assets	21,928	29,077
Current liabilities:
Accounts payable	3,794	1,486
Accrued expenses	2,555	3,368
Current term loans, net	19,137	19,061
Accrued final payment on term loans, current	1,100	1,100
Lease liabilities, current portion	66	60
Total current liabilities	26,652	25,075
Earn-out liability	6	6
Non-current warrant liability	40	40
Non-current lease liabilities	43	60
Total liabilities	26,741	25,181
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value; 100,000,000 shares authorized at March 31, 2023 and December 31, 2022 ; zero shares issued and outstanding as of March 31, 2023 and December 31, 2022	0	0
Common stock, $0.0001 par value; 1,000,000,000 shares authorized at March 31, 2023 and December 31, 2022; 42,401,219 shares issued and 42,0101,219 shares issued and outstanding as of March 31, 2023; 41,990,383 shares issued and 41,690,383 shares issued and outstanding as of December 31, 2022	4	4
Additional paid-in capital	148,762	147,476
Accumulated other comprehensive income (loss)	1	(18)
Accumulated deficit	(153,580)	(143,566)
Total stockholders' equity (deficit)	(4,813)	3,896
Total liabilities and stockholders' equity (deficit)	$ 21,928	$ 29,077