Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 31,004	$ 76,015
Marketable securities (Note 4)	265,198	15,942
Accounts receivable—due from related parties	577
Contract assets—due from related parties	856
Prepaid expenses and other current assets	4,704	888
Total current assets	302,339	92,845
Marketable securities, non-current (Note 4)	162,531
Property and equipment, net (Note 6)	10,841	3,794
Right-of-use assets, operating leases	9,845	18,289
Other assets	30
Restricted cash	1,589	1,774
Total assets	487,175	116,702
Current liabilities:
Accounts payable	4,368	3,276
Accrued expenses (Note 8)	10,330	4,568
Deferred revenue, current	92,552	23,349
Operating lease liabilities, current portion	2,572	2,696
Finance lease liabilities, current portion	689	681
Other current liabilities	106
Total current liabilities	110,617	34,570
Non-current liabilities
Deferred revenue, net of current portion	77,838	29,642
Operating lease liabilities, net of current portion	14,128	16,651
Finance lease liabilities, net of current portion	604	1,165
Other non-current liabilities	100
Total liabilities	203,287	82,028
Commitments and contingencies (Note 9)
Stockholders’ equity (deficit):
Preferred stock, $0.0001 par value; 10,000,000 and 0 shares authorized as of December 31, 2020 and December 31, 2019, respectively; 0 shares issued or outstanding as of December 31, 2020 and December 31, 2019
Common stock, $0.0001 par value; 150,000,000 and 45,000,000 shares authorized at December 31, 2020 and December 31, 2019, respectively, 44,592,288 and 2,208,982 shares issued at December 31, 2020 and December 31, 2019, respectively; 44,482,186 and 1,929,516 shares outstanding at December 31, 2020 and December 31, 2019, respectively	4
Additional paid-in capital	412,777	2,044
Accumulated deficit	(128,765)	(76,456)
Accumulated other comprehensive (loss) income	(128)	6
Total stockholders’ equity (deficit)	283,888	(74,406)
Total liabilities, convertible preferred stock and stockholders’ equity (deficit)	$ 487,175	116,702
Series Seed Convertible Preferred Stock
Non-current liabilities
Temporary equity, value		5,900
Series A Convertible Preferred Stock
Non-current liabilities
Temporary equity, value		29,237
Series B Convertible Preferred Stock
Non-current liabilities
Temporary equity, value		59,918
Series B-1 Convertible Preferred
Non-current liabilities
Temporary equity, value		$ 14,025

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).