Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (31,253)	$ (18,586)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	2,402	1,130
Stock-based compensation	2,008	847
Changes in current assets and liabilities:
Prepaid expenses and other assets	492	(2,219)
Prepaid rent	(1,388)	0
Right-of-use assets and lease liabilities, net	(60)	40
Accounts payable	1,232	1,593
Accrued expense and other liabilities	(2,187)	(325)
Deferred revenue	(4,737)	(3,137)
Net cash used in operating activities	(33,491)	(20,657)
Cash flows from investing activities:
Purchases of property and equipment	(2,424)	(6,877)
Net cash used in investing activities	(2,424)	(6,877)
Cash flows from financing activities:
Proceeds from issuance of convertible preferred stock, net of issuance costs	0	99,730
Proceeds from exercise of stock options	119	170
Payment of deferred offering costs	0	(960)
Net cash provided by financing activities	119	98,940
Net (decrease) increase in cash, cash equivalents and restricted cash	(35,796)	71,406
Cash, cash equivalents, and restricted cash - beginning of period	166,436	35,386
Cash, cash equivalents, and restricted cash - end of period	130,640	106,792
Summary of cash, cash equivalents and restricted cash reported within the consolidated balance sheets:
Cash and cash equivalents	125,603	106,197
Restricted cash	5,037	595
Total cash, cash equivalents, and restricted cash	130,640	106,792
Supplemental cash flow information:
Purchase of property and equipment in accounts payable and accrued liabilities	213	379
Deferred offering costs included in accrued expenses	$ 0	$ 1,580