CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities
Net loss	$ (20,806)	$ (25,615)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	3,247	2,279
Depreciation and amortization	27	37
Net accretion of discount on available-for-sale securities	0	(432)
Non-cash lease expense	121	114
Loss on disposal of property and equipment	2	2
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	727	709
Other assets	73	145
Accounts payable	(2,650)	(481)
Accrued expenses and other current liabilities	(3,079)	2,656
Deferred revenue	(3,613)	10,871
Other liabilities	(113)	(82)
Net cash used in operating activities	(26,064)	(9,797)
Cash flows from investing activities
Proceeds from maturities of investments	0	44,365
Purchase of investments	0	(11,881)
Net cash provided by investing activities	0	32,484
Cash flows from financing activities
Proceeds from issuance of common stock and warrants	0	53,616
Proceeds from exercise of common stock options	180	0
Proceeds from issuance of common stock related to employee stock purchase plan	52	99
Proceeds from exercise of pre-funded warrants	0	8
Payment of offering costs	0	(2,721)
Repayment of term loan	(811)	(811)
Tax withholding payments on restricted stock units	(13)	(94)
Net cash (used in) provided by financing activities	(592)	50,097
Net (decrease) increase in cash, cash equivalents, and restricted cash	(26,656)	72,784
Cash, cash equivalents, and restricted cash at beginning of period	96,374	24,732
Cash, cash equivalents, and restricted cash at end of period	69,718	97,516
Reconciliation of cash, cash equivalents, and restricted cash
Cash and cash equivalents	69,683	97,482
Restricted cash, long-term (included in other assets)	35	34
Total cash, cash equivalents and restricted cash	$ 69,718	$ 97,516