Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities
Net loss	$ (102,937)	$ (81,622)
Adjustments to reconcile net loss to net cash used in operating activities:
Reversal of non-cash consideration related to revenue	(41,200)
Depreciation and amortization expense	3,065	992
Amortization of finance lease right-of-use asset		22
Amortization of intangible assets	1,687	422
Gain on disposal of property and equipment		(44)
Non-cash operating lease expense	5,688	1,486
Stock-based compensation expense	12,785	3,611
Change in fair value of redeemable convertible preferred stock tranche liability		27,696
Change in fair value of contingent consideration and contingent value rights liabilities	27,317	1,510
Accretion of discounts and amortization of premiums on marketable securities	211	4
Financial advisory expenses paid through issuance of common stock		500
Deferred income taxes	2,093	(2,003)
Gain on sale of assets to equity method investment	(7,227)
Share of net loss of equity method investment	1,636	0
Changes in operating assets and liabilities:
Accounts receivable	(9,799)	818
Prepaid expenses and other assets	675	(7,980)
Accounts payable	4,547	553
Accrued and other liabilities	1,972	(825)
Operating lease liabilities	(3,162)	(423)
Deferred revenue	(95)	(565)
Net cash used in operating activities	(102,744)	(55,848)
Cash Flows from Investing Activities
Cash, cash equivalents and restricted cash acquired in connection with the Merger		74,909
Purchases of marketable securities	(232,343)	(16,590)
Proceeds from marketable securities	121,315	52,000
Purchases of property and equipment	(1,878)	(797)
Proceeds from sale of property and equipment	267	150
Net cash provided by (used in) investing activities	(112,639)	109,672
Cash Flows from Financing Activities
Proceeds from issuance of common stock pursuant to subscription agreements prior to Merger, net of offering costs		109,414
Proceeds from issuance of common stock and accompanying pre-funded warrants in underwritten public offering, net of issuance costs	172,527
Proceeds from exercise of stock options and warrants and from employee stock purchase plan	3,106	446
Proceeds from at-the-market-sales agreement, net of issuance costs	33,891
Proceeds from issuance of redeemable convertible preferred stock and related tranche rights, net of issuance costs		14,479
Repayment of finance lease liability		(47)
Net cash provided by financing activities	209,524	124,292
Effect of exchange rate changes on cash, cash equivalents and restricted cash	157	27
Net increase (decrease) in cash, cash equivalents and restricted cash	(5,702)	178,143
Cash, cash equivalents and restricted cash at beginning of period	189,500	11,357
Cash, cash equivalents and restricted cash at end of period	183,798	189,500
Reconciliation of Cash, Cash Equivalents and Restricted Cash
Cash and cash equivalents	181,724	187,750
Restricted cash	2,074	1,750
Total cash, cash equivalents and restricted cash	183,798	189,500
Supplemental Cash Flow Information
Cash paid for amounts included in the measurement of lease liabilities	6,270	1,321
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Purchases of property and equipment included in accounts payable and in accrued and other current liabilities	174	425
Right-of-use asset for office space acquired through leases	5,406	1,449
Issuance costs incurred but unpaid	286
Investment in equity securities acquired through non-cash consideration	$ 41,200
Fair value of net assets acquired in Merger		185,992
Conversion of redeemable convertible stock to common stock upon closing of the Merger		44,037
Financial advisory expenses paid through issuance of common stock		500
Termination of redeemable convertible preferred stock tranche liability		$ 9,723