Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 68,395	$ 47,976
Marketable securities (Note 4)	338,771	394,442
Contract assets-due from related party	2,537	135
Prepaid expenses and other current assets	9,713	8,720
Total current assets	419,416	451,273
Marketable securities, non-current (Note 4)	152,328	125,187
Property and equipment, net (Note 6)	13,334	11,881
Right-of-use assets, operating leases	8,909	9,426
Other non-current assets	3,017	2,022
Restricted cash	6,130	6,116
Total assets	603,134	605,905
Current liabilities:
Accounts payable	4,335	4,005
Accrued expenses (Note 8)	27,502	22,971
Deferred revenue	35,260	61,739
Operating lease liabilities	2,535	2,461
Finance lease liabilities	1,408	1,138
Other current liabilities	303	228
Total current liabilities	71,343	92,542
Non-current liabilities
Deferred revenue, net of current portion	28,000	39,295
Operating lease liabilities, net of current portion	12,146	13,224
Finance lease liabilities, net of current portion	1,246	1,140
Other non-current liabilities	248	66
Total liabilities	112,983	146,267
Commitments and contingencies (Note 9)
Stockholders' equity:
Common stock, $0.0001 par value; 150,000,000 shares authorized at December 31, 2022 and 2021, 55,039,380 and 51,573,924 shares issued at December 31, 2022 and 2021, respectively; 55,039,380 and 51,536,181 shares outstanding at December 31, 2022 and 2021, respectively	6	5
Additional paid-in capital	878,884	689,275
Accumulated deficit	(383,790)	(228,982)
Accumulated other comprehensive loss	(4,949)	(660)
Total stockholders' equity	490,151	459,638
Total liabilities and stockholders' equity	$ 603,134	$ 605,905

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).