CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 17,289	$ 26,884
Prepaid expenses and other current assets	3,404	2,716
Total current assets	20,693	29,600
Property and equipment, net	51	58
Operating lease right-of-use asset	45	59
Total assets	20,789	29,717
Current liabilities:
Accounts payable	2,982	1,605
Accrued liabilities	1,706	3,136
Lease liability, current portion	53	69
Total current liabilities	4,741	4,810
Commitments and contingencies (Note 6)
Stockholders’ equity:
Common stock, $0.01 par value, 300,000,000 shares authorized as of March 31, 2022 and December 31, 2021; 119,377,286 shares issued and outstanding as of March 31, 2022 and December 31, 2021	1,194	1,194
Additional paid-in capital	169,631	169,080
Accumulated deficit	(154,777)	(145,367)
Total stockholders’ equity	16,048	24,907
Total liabilities and stockholders’ equity	$ 20,789	$ 29,717

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).