Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net loss	$ (48,625)	$ (26,127)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	3,328	1,230
Stock-based compensation	2,516	515
Loss of sale of property and equipment		2
Changes in current assets and liabilities:
Prepaid expenses and other assets	(2,595)	(1,205)
Right-of-use assets and lease liabilities, net	(9)	442
Accounts payable	10	1,127
Accrued expense and other liabilities	3,234	1,550
Deferred revenue	(6,536)	19,443
Net cash used in operating activities	(48,677)	(3,023)
Cash flows from investing activities:
Purchases of property and equipment	(9,941)	(4,238)
Net cash used in investing activities	(9,941)	(4,238)
Cash flows from financing activities:
Proceeds from issuance of convertible preferred stock, net of issuance costs	99,730
Proceeds from exercise of stock options	291	288
Proceeds from initial public offering, net of issuance costs	89,647
Net cash provided by financing activities	189,668	288
Net increase (decrease) in cash, cash equivalents and restricted cash	131,050	(6,973)
Cash, cash equivalents, and restricted cash - beginning of year	35,386	42,359
Cash, cash equivalents, and restricted cash - end of year	166,436	35,386
Summary of cash, cash equivalents and restricted cash reported within the consolidated balance sheets:
Cash and cash equivalents	161,405	34,791
Restricted cash	5,031	595
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	166,436	35,386
Supplemental cash flow information:
Purchase of property and equipment in accounts payable and accrued liabilities	828	1,335
Conversion of convertible preferred stock to common stock upon closing of initial public offering	$ 159,411
Right-of-use-assets obtained in exchange for operating lease liabilities		$ 3,199