Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net loss	$ (22,452)	$ (16,255)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	2,162	1,610
Depreciation expense	136	284
Net amortization of premium on short-term investments	(933)	(726)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(257)	843
Operating lease right-of-use assets	(824)	398
Other assets	568	(2,446)
Accounts payable	(560)	3,295
Accrued expenses and other current liabilities	827	(2,318)
Operating lease liabilities	(590)	(125)
Deferred revenue	(532)	(410)
Net cash used in operating activities	(22,455)	(15,850)
Cash flows from investing activities:
Purchases of property and equipment	(2,149)	(45)
Purchases of short-term investments	(20,525)	(4,440)
Maturity of short-term investments	30,531	9,800
Net cash provided by investing activities	7,857	5,315
Cash flows from financing activities:
Proceeds from sale of common stock, purchase warrants and pre-funded warrants, net of issuance costs	8,810
Payment of deferred offering costs	(169)
Proceeds from exercise of stock options	3	4
Net cash provided by financing activities	8,644	4
Net decrease in cash, cash equivalents and restricted cash	(5,954)	(10,531)
Cash, cash equivalents and restricted cash, beginning of period	23,745	33,942
Cash, cash equivalents and restricted cash, end of period	17,791	$ 23,411
Supplemental disclosure of non-cash financing and investing activities:
Property and equipment purchases included in accounts payable	350
Right of Use Asset in Exchange for Lease Liability	13,667
Prepaid expenses for right-of-use asset included in operating lease liabilities	688
Deferred offering costs included in accounts payable and accrued expense	$ 121