Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 13,493	$ 19,650
Marketable securities	1,999	4,998
Restricted cash	87	84
Prepaid expenses and other assets	300	521
Total current assets	15,879	25,253
Property and equipment, net	244	251
Operating right-of-use assets	644	775
Total assets	16,767	26,279
Current liabilities:
Accounts payables	279	275
Lease liabilities	278	187
Accrued liabilities	1,427	883
Total current liabilities	1,984	1,345
Non current liabilities:
Long-term lease liabilities	402	626
Total liabilities	2,386	1,971
Commitments and contingencies
Stockholders’ equity:
Common stock; $0.01 par value; 60,000,000 shares authorized as of December 31, 2021 and 2020; 7,108,133 shares issued and outstanding as of December 31, 2021 and 2020	72	72
Additional paid-in capital	69,902	68,516
Accumulated deficit	(55,593)	(44,280)
Total stockholders’ equity	14,381	24,308
Total liabilities and stockholders’ equity	$ 16,767	$ 26,279

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).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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).