Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 32,326	$ 39,230
Prepaid expenses and other current assets	1,171	1,133
Total current assets	33,497	40,363
Property and equipment-net	920	840
Operating lease right-of-use assets	9,513	9,952
Other noncurrent assets	448	448
Total assets	44,378	51,603
Current liabilities:
Accounts payable	1,051	845
Accrued expenses	1,524	1,673
Current loan payable (net of discount and issuance costs of $139 and $112, respectively)	6,458	4,285
Current operating lease liabilities	858	952
Accrued compensation	690	1,543
Interest payable	110	113
Total current liabilities	10,691	9,411
Loan payable (net of discount and issuance costs of $454 and $756, respectively)	4,140	6,264
Noncurrent operating lease obligations	8,915	9,160
Total liabilities	23,746	24,835
Commitments and contingencies (Note 5)
Stockholders' equity:
Common stock, $0.001 par value; 100,000,000 shares authorized; 22,217,265 and 22,045,255 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively	22	22
Additional paid-in capital	193,777	192,009
Accumulated deficit	(173,167)	(165,263)
Total stockholders’ equity	20,632	26,768
Total liabilities and stockholders’ equity	$ 44,378	$ 51,603