CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 368,358	$ 494,136
Short-term investments	957,584	905,150
Prepaid expenses and other current assets	29,036	28,800
Total current assets	1,354,978	1,428,086
Property and equipment, net	2,590	2,627
Restricted cash	633	633
Right-of-use asset	3,238	3,804
Other investments	4,000	4,000
Other non-current assets	18,516	15,866
Total assets	1,383,955	1,455,016
Current liabilities:
Accounts payable	20,731	19,950
Accrued expenses	36,785	29,596
Lease liability, current	2,368	2,370
Total current liabilities	59,884	51,916
Non-current liabilities:
Contingent earn-out liability	5,231	7,160
Warrant liabilities	3,405	5,293
Lease liability, non-current	849	1,461
Restricted stock repurchase liability	275	324
Total liabilities	69,644	66,154
Commitments and contingencies (note 12)
Stockholders' equity:
Preferred Stock, $0.0001 par value, 2,000,000 shares authorized; no shares issued and outstanding as of March 31, 2023 and December 31, 2022
Common Stock, $0.0001 par value; 1,250,000,000 shares authorized as of March 31, 2023 and December 31, 2022; 538,474,800 and 538,549,210 shares issued as of March 31, 2023 and December 31, 2022, respectively; and 480,829,944 and 478,674,305 shares outstanding at March 31, 2023 and December 31, 2022, respectively	49	49
Additional paid-in capital	1,924,318	1,916,550
Accumulated other comprehensive income (loss)	84	(148)
Accumulated deficit	(610,140)	(527,589)
Total stockholders' equity	1,314,311	1,388,862
Total liabilities and stockholders' equity	$ 1,383,955	$ 1,455,016