CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating activities
Net loss	$ (19,505)	$ (14,152)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization expense	170	95
Stock-based compensation	2,850	792
Amortization of premiums and accretion of discounts on investments, net	(579)	(56)
Other	42	81
Change in operating assets and liabilities:
Contracts and other receivables	0	(3)
Prepaid materials	(172)	0
Prepaid expenses and other assets	(1,314)	821
Accounts payable	396	188
Accrued liabilities	358	(371)
Accrued research and development expenses	147	(497)
Accrued compensation	(1,109)	(676)
Operating lease right-of-use assets and liabilities, net	(51)	(40)
Other liabilities	(1,612)	(548)
Net cash used in operating activities	(20,379)	(14,366)
Investing activities
Purchases of investments	(78,315)	0
Maturities of investments	0	15,000
Purchases of property and equipment	(312)	(1)
Net cash (used in) provided by investing activities	(78,627)	14,999
Financing activities
Proceeds from issuance of securities through private placement, net of issuance costs	93,854	14,003
Proceeds from issuance of common stock, net	(119)	51
Proceeds from exercise of common stock options	3	0
Payments on term loan	(1,377)	(1,652)
Net cash provided by financing activities	92,361	12,402
Net (decrease) increase in cash and cash equivalents	(6,645)	13,035
Cash and cash equivalents at beginning of period	23,829	24,290
Cash and cash equivalents at end of period	17,184	37,325
Reconciliation of cash, cash equivalents and restricted cash
Cash and cash equivalents	17,122	37,263
Restricted cash	62	62
Total cash, cash equivalents and restricted cash	17,184	37,325
Supplemental disclosure of cash flow information
Interest paid	(60)	(276)
Income taxes paid	(1)	(1)
Supplemental disclosure of non-cash investing and financing activities
Non-cash acquisition of property and equipment	$ 0	$ 33