STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities
Net loss	$ (47,919)	$ (46,180)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	4,622	3,631
Depreciation and amortization	70	74
Net amortization (accretion) of premium/discount on available-for-sale securities	(636)	16
Non-cash lease expense	230	355
Gain on lease termination	0	(750)
Loss on disposal of property and equipment	2	39
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(2,636)	(817)
Other assets	96	90
Accounts payable	1,906	(1,397)
Accrued expenses and other current liabilities	6,255	3,587
Deferred Revenue	4,911	0
Other liabilities	(176)	(331)
Net cash used in operating activities	(33,275)	(41,683)
Cash flows from investing activities
Proceeds from maturities of investments	67,665	60,500
Purchases of investments	(11,881)	(36,800)
Purchases of property and equipment	(7)	(8)
Net cash provided by investing activities	55,777	23,692
Cash flows from financing activities
Proceeds from Issuance of Common Stock and Warrants	53,616	0
Proceeds from issuance of common stock related to employee stock purchase plan	169	76
Proceeds from exercise of pre-funded warrants	8	0
Proceeds from exercise of common stock options	1	2
Payment of offering costs	(2,721)	(279)
Repayment of term loan	(1,622)	0
Tax withholding payments on restricted stock units	(311)	(40)
Net cash provided by (used in) financing activities	49,140	(241)
Net increase (decrease) in cash, cash equivalents, and restricted cash	71,642	(18,232)
Cash, cash equivalents, and restricted cash at beginning of period	24,732	42,964
Cash, cash equivalents, and restricted cash at end of period	96,374	24,732
Reconciliation of cash, cash equivalents, and restricted cash
Cash and cash equivalents	96,339	24,487
Restricted cash, short-term (included in other current assets)	0	216
Restricted cash, long-term (included in other assets)	35	29
Total cash, cash equivalents and restricted cash	96,374	24,732
Supplemental cash flow data:
Cash paid for interest on term loan	369	266
Supplemental disclosure of non-cash investing and financing activities:
Deferred offering costs included in accrued expenses	51	53
Right-of-use assets recognized in exchange for lease liabilities	$ 11	$ 1,418