CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net loss	$ (171,962)	$ (69,784)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	189	73
Non-cash lease expense	928
Amortization and accretion of discounts on short-term investments	1,197	502
Stock compensation expense	43,975	9,429
Changes in operating assets and liabilities:
Unbilled grant receivables		298
Accrued interest	400	(188)
Prepaid expenses and other current assets	(1,241)	(3,867)
Other assets	(1,102)
Income tax payable	1,007
Accounts payable, accrued expenses and amount due to related party	20,290	2,726
Net cash used in operating activities	(106,319)	(60,811)
Cash flows from investing activities
Purchase of property and equipment	(26)	(235)
Purchase of short-term investments	(76,591)	(300,262)
Maturities of short-term investments	262,600	131,000
Net cash provided by (used in) investing activities	185,983	(169,497)
Cash flows from financing activities
Payment of initial public offering costs		(3,474)
Proceeds from issuance of common stock upon initial public offering, net of underwriting discounts of $22,238		295,449
Proceeds from exercise of stock options	232
Net cash provided by financing activities	232	291,975
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(44)	(90)
Net increase in cash, cash equivalents, and restricted cash	79,852	61,577
Cash, cash equivalents, and restricted cash at beginning of period	122,661	61,084
Cash, cash equivalents, and restricted cash at end of period	202,513	122,661
Non-cash investing and financing activities
Unrealized gain (loss) on available-for-sale securities	1	(90)
Right-of-use assets obtained in exchange for operating lease liability	26,386
Purchase of property and equipment included in AP and accrued expenses	899	300
Conversion of preferred stock to common stock upon initial public offering		173,127
Cash and cash equivalents	201,661	122,661
Restricted Cash	852
Total cash, cash equivalents, and restricted cash	$ 202,513	$ 122,661