Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities
Net loss	$ (27,460)	$ (24,254)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	293	313
Stock-based compensation	3,614	3,632
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(2,106)	(2,278)
Accounts payable and accrued expenses	3,151	(2,433)
Right-of-use assets and lease liabilities, net	(146)	(116)
Net cash used in operating activities	(22,654)	(25,136)
Cash flows from investing activities
Purchases of property and equipment	(50)	(10)
Net cash used in investing activities	(50)	(10)
Cash flows from financing activities
Payments for taxes related to net settlement of equity awards	(116)	(405)
Net cash provided by (used in) financing activities	(116)	(405)
Net increase (decrease) in cash and cash equivalents	(22,820)	(25,551)
Cash and cash equivalents, beginning of period	215,507	244,979
Cash and cash equivalents, end of period	192,687	219,428
Supplemental disclosure of non-cash investing and financing activities
Property and equipment additions included in accounts payable and accrued expenses	0	23
TaxRelatedToNetSettlementOfEquityAwardsIncludedInAccountsPayableAndAccruedExpenses	$ 17	$ 32