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	$ (57,917)	$ (63,284)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	3,253	2,764
Noncash lease expense	1,570	1,335
Stock-based compensation expense	11,683	9,788
Amortization of deferred debt issuance costs	39	28
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(1,723)	186
Other non-current assets	190	177
Accounts payable	(775)	(1,624)
Operating lease liabilities	(1,792)	1,618
Accrued and other current and non-current liabilities	(799)	19
Net cash used in operating activities	(46,271)	(48,993)
Cash flows from investing activities
Purchases of property and equipment	(541)	(3,422)
Net cash used in investing activities	(541)	(3,422)
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	195	4
Proceeds from Employee Stock Purchase Plan	198	225
Taxes withheld and paid related to net share settlement of equity awards	(141)	(10)
Net cash provided by financing activities	111,170	219
Net change in cash and cash equivalents	64,358	(52,196)
Cash and cash equivalents at the beginning of period	159,711	257,656
Cash and cash equivalents, at the end of period	224,069	205,460
Supplemental disclosures of noncash investing and financing activities
Purchases of property and equipment included in accounts payable and accrued expenses	$ 256	$ 670