Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (31,056)	$ (13,098)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	966	689
Amortization of premium on marketable securities	143
Stock-based compensation	2,094	432
Non-cash operating lease expense	332	171
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	732	118
Other noncurrent assets	25	(3,313)
Accounts payable	(1,779)	618
Accrued expenses and other current liabilities	318	(1,022)
Operating lease liabilities	(533)	(384)
Other noncurrent liabilities	2
Net cash used in operating activities	(28,756)	(15,789)
Cash flows from investing activities:
Purchases of property and equipment	(8,595)	(4,323)
Purchases of marketable securities	(43,171)
Proceeds from maturities of marketable securities	68,200
Net cash provided by (used in) investing activities	16,434	(4,323)
Cash flows from financing activities:
Proceeds from exercise of stock options	15	29
Net cash provided by financing activities	15	20,015
Net change in cash, cash equivalents and restricted cash	(12,307)	(97)
Cash and cash equivalents and restricted cash at beginning of period	38,676	129,083
Cash and cash equivalents and restricted cash at end of period	26,369	128,986
Components of cash, cash equivalents and restricted cash:
Cash and cash equivalents	25,970	128,439
Restricted cash, noncurrent	399	547
Cash, cash equivalents and restricted cash	26,369	128,986
Supplemental disclosure of cash operating activities:
Cash paid for leases included in operating cash outflows	1,366	1,389
Supplemental disclosure of non-cash operating activities:
Lease liability obtained in exchange for right-of-use asset		213
Supplemental disclosure of non-cash investing and financing activities:
Deferred offering costs related to initial public offering included in accounts payable		74
Property and equipment included in accounts payable and accrued expenses and other current liabilities	$ 5,282	452
Series C Convertible Preferred Stock
Cash flows from financing activities:
Proceeds from issuance of convertible preferred stock, net of issuance costs		$ 19,986