Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 61,615	$ 138,704
Marketable securities	38,874	137,207
Prepaid expenses and other current assets	10,351	11,498
Total current assets	110,840	287,409
Property and equipment, net	971	1,213
Operating lease right-of-use assets	2,901	3,653
Other non-current assets	416	472
Total assets	115,128	292,747
Current liabilities:
Accounts payable	14,672	10,780
Accrued expenses	15,850	26,844
Current operating lease liabilities	1,005	810
Current portion of deferred revenue	2,818	0
Total current liabilities	34,345	38,434
Long-term liabilities:
Non-current portion of operating lease liabilities	2,495	3,501
Non-current portion of deferred revenue	2,182	0
Total liabilities	39,022	41,935
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized and no shares issued or outstanding as of December 31, 2022 and December 31, 2021	0	0
Common stock, $0.0001 par value; 150,000,000 shares authorized; 49,382,453 shares issued and outstanding as of December 31, 2022, and 45,300,514 shares issued and outstanding as of December 31, 2021	5	5
Additional paid-in capital	606,918	567,598
Accumulated other comprehensive loss	(173)	(176)
Accumulated deficit	(530,644)	(316,615)
Total stockholders’ equity	76,106	250,812
Total liabilities and stockholders’ equity	$ 115,128	$ 292,747

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).