CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net loss	$ (30,804)	$ (28,433)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation expense	943	837
Non-cash lease expense	1,232	1,139
Stock-based compensation	3,081	4,068
Interest amortization on marketable securities	(797)	(1,202)
Changes in operating assets and liabilities:
Operating lease liabilities	(921)	(730)
Prepaid expenses and other current assets	(710)	7
Accounts payable and accrued liabilities	(2,482)	(88)
Other assets	(7)	134
Net cash used in operating activities	(30,465)	(24,268)
Cash flow from investing activities
Purchases of marketable securities	(9,913)	(23,408)
Proceeds from maturities of marketable securities	54,000	30,000
Purchases of property and equipment	(114)	(94)
Net cash provided by investing activities	43,973	6,498
Cash flow from financing activities
Payment of issuance costs related to underwritten public offering and concurrent private placement		(717)
Proceeds from the issuance of common stock from at-the-market sales agreement, net of issuance costs	278	3,622
Shares repurchased for tax withholdings upon vesting of restricted stock unit awards	(182)	(400)
Proceeds from stock option exercises		14
Net cash provided by financing activities	96	2,519
Net decrease in cash, cash equivalents and restricted cash equivalents	13,604	(15,251)
Cash, cash equivalents and restricted cash equivalents, beginning of period	33,773	60,119
Cash, cash equivalents and restricted cash equivalents, end of period	47,377	44,868
Supplemental disclosure of non-cash activities
Right-of-use assets obtained in exchange for lease obligations		270
Purchases of property and equipment in accounts payable and accrued liabilities	14	$ 3
Financing costs associated with the sale of common stock included in accounts payable and accrued expenses	$ 92