Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net loss	$ (28,016)	$ (30,881)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	1,651	1,254
Noncash lease expense	777	561
Stock-based compensation expense	5,679	4,765
Amortization of deferred debt issuance costs	39	17
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(200)	214
Other non-current assets	92	84
Accounts payable	(208)	(2,333)
Operating lease liabilities	(888)	2,474
Accrued and other current and non-current liabilities	(1,775)	(249)
Net cash used in operating activities	(22,849)	(24,094)
Cash flows from investing activities
Purchases of property and equipment	(239)	(1,915)
Net cash provided by (used in) investing activities	(239)	(1,915)
Cash flows from financing activities
Proceeds from issuance of common stock pursuant to at-the-market offering, net of issuance costs	19,266	0
Proceeds from issuance of common stock and pre-funded warrants pursuant to underwritten public offering, net of issuance costs	91,652	0
Proceeds from exercise of stock options	189	3
Taxes withheld and paid related to net share settlement of equity awards	(141)	(10)
Net cash provided by (used in) financing activities	110,966	(7)
Net change in cash and cash equivalents	87,878	(26,016)
Cash and cash equivalents at the beginning of period	159,711	257,656
Cash and cash equivalents, at the end of period	247,589	231,640
Supplemental disclosures of noncash investing and financing activities
Purchases of property and equipment included in accounts payable and accrued expenses	$ 320	$ 1,081