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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Cash flows from operating activities    
Net loss $ (28,008) $ (25,208)
Adjustments to reconcile net loss to net cash from operating activities:    
Depreciation 581 309
Noncash operating lease expense 877 361
Stock-based compensation 4,219 3,205
Other, net (889) 54
Changes in operating assets and liabilities:    
Accounts Receivable 2,000  
Prepaid expenses and other current assets (2,783) (3,687)
Other long-term assets (13) 4
Accounts payable 1,552 (359)
Accrued expenses and other liabilities (6,703) (157)
Operating lease liabilities 26 (429)
Deferred revenue (5,766) (3,758)
Net cash used in operating activities (34,907) (29,665)
Cash flows from investing activities    
Purchase of property and equipment (620) (1,561)
Sales and maturities of marketable securities 84,705 44,415
Purchases of marketable securities (52,534) (54,571)
Net cash provided by (used in) investing activities 31,551 (11,717)
Cash flows from financing activities    
Proceeds from issuance of common stock upon exercise of stock options 73 265
Payment of Business Combination and PIPE Financing transaction costs   (8)
Net cash provided by financing activities 73 257
Net change in cash, cash equivalents and restricted cash (3,283) (41,125)
Cash, cash equivalents and restricted cash, beginning of period 63,958 145,024
Cash, cash equivalents and restricted cash, end of period 60,675 103,899
Supplemental cash flow information:    
Cash paid for leases 746 465
Supplemental disclosure of noncash investing and financing activity:    
Purchases of property and equipment included in accounts payable and accrued expenses 290 $ 500
Revaluation of right-of-use asset and lease liability upon to lease remeasurement $ (215)