Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net loss	$ (23,863)	$ (19,115)
us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract
Depreciation and amortization	306	374
Share-based compensation	4,124	2,895
Amortization of premium and discount on marketable securities	(1,103)	(1,628)
ROU asset amortization	623	582
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(5,899)	1,662
Accounts payable	(2,898)	(2,658)
Accrued expenses	4,713	(3,863)
Operating lease liability	(645)	(591)
Net cash used in operating activities	(24,642)	(22,342)
Cash flows from investing activities:
Purchases of marketable securities	(72,950)	(92,964)
Proceeds from sale or maturities of marketable securities	75,334	96,577
Purchases of property and equipment	0	(11)
Net cash provided by investing activities	2,384	3,602
Cash flows from financing activities:
Proceeds from issuance of common stock	(18,113)	(3,126)
Issuance costs from issuance of common stock	(543)	(95)
Taxes paid related to net shares settlement of RSUs	(136)	0
Proceeds from exercise of stock options	0	41
Net cash provided by financing activities	17,434	3,072
Net change in cash and cash equivalents	(4,824)	(15,668)
Cash and cash equivalents at beginning of period	24,228	34,946
Cash and cash equivalents at end of period	19,404	19,278
Supplemental disclosure of cash flow information
Unrealized (loss) gain on marketable securities	$ (128)	$ (205)