Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities
Net Income (Loss)	$ (123,462)	$ (106,482)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,221	1,199
Loss on disposal of property and equipment	2	13
Stock-based compensation	13,544	14,563
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(11)	(2,611)
Accounts payable and accrued expenses	5,284	3,411
Right-of-use assets and lease liabilities, net	(593)	(513)
Net cash used in operating activities	(104,015)	(90,420)
Cash flows from investing activities
Purchases of property and equipment	(98)	(268)
Proceeds from sale of property and equipment	0	3
Net cash used in investing activities	(98)	(265)
Cash flows from financing activities
Proceeds from issuance of common stock, net of issuance costs	0	61,682
Proceeds from issuance of common stock under Employee Stock Purchase Plan	336	289
Payments for taxes related to net settlement of equity awards	(259)	(758)
Net cash provided by financing activities	77	61,213
Net decrease in cash and cash equivalents	(104,036)	(29,472)
Cash and cash equivalents, beginning of period	215,507	244,979
Cash and cash equivalents, end of period	111,471	215,507
Supplemental disclosure of non-cash investing and financing activities
Property and equipment additions included in accounts payable and accrued expenses	0	1
Tax related to net settlement of equity award included in accounts payable and accrued expenses	$ 6	$ 67