CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 155,658	$ 47,976
Marketable securities (Note 4)	326,250	394,442
Contract assets	2,882	135
Prepaid expenses and other current assets	9,232	8,720
Total current assets	494,022	451,273
Marketable securities, non-current (Note 4)	113,701	125,187
Property and equipment, net (Note 6)	12,569	11,881
Right-of-use assets, operating leases	9,048	9,426
Other non-current assets	3,016	2,022
Restricted cash	6,116	6,116
Total assets	638,472	605,905
Current liabilities:
Accounts payable	6,327	4,005
Accrued expenses (Note 8)	24,692	22,971
Deferred revenue	55,776	61,739
Operating lease liabilities	2,516	2,461
Finance lease liabilities	1,103	1,138
Other current liabilities	710	228
Total current liabilities	91,124	92,542
Non-current liabilities
Deferred revenue, net of current portion	21,086	39,295
Operating lease liabilities, net of current portion	12,431	13,224
Finance lease liabilities, net of current portion	690	1,140
Other non-current liabilities	256	66
Total liabilities	125,587	146,267
Stockholders’ equity:
Common stock, $0.0001 par value; 150,000,000 shares authorized as of September 30, 2022 and December 31 2021, 54,751,429 and 51,573,924 shares issued at September 30, 2022 and December 31, 2021, respectively; 54,751,429 and 51,536,181 shares outstanding at September 30, 2022 and December 31, 2021, respectively	6	5
Additional paid-in capital	867,717	689,275
Accumulated deficit	(348,925)	(228,982)
Accumulated other comprehensive loss	(5,913)	(660)
Total stockholders’ equity	512,885	459,638
Total liabilities and stockholders’ equity	$ 638,472	$ 605,905