Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets, Current [Abstract]
Cash and cash equivalents	$ 3,781	$ 3,702
Marketable securities, available-for-sale	0	3,808
Prepaid expenses and other current assets	371	619
Total current assets	4,152	8,129
Other assets	0	206
Total assets	4,152	8,335
Liabilities, Current [Abstract]
Accounts payable	977	918
Accrued expenses	711	1,430
Warrant liability	122	0
Other current liabilities	0	97
Total current liabilities	1,810	2,445
Other liabilities	0	72
Total liabilities	1,810	2,517
Commitments and contingencies (Note 9)
Stockholders' equity (deficit):
Common stock, $0.0001 par value; 250,000,000 shares authorized; 6,812,836 and 4,506,216 shares issued and outstanding as of December 31, 2021 and 2020, respectively	1	0
Additional paid-in-capital	31,267	27,722
Accumulated other comprehensive loss	0	(2)
Accumulated deficit	(28,926)	(21,902)
Total stockholders' equity (deficit)	2,342	5,818
Total liabilities and stockholders' equity (deficit)	$ 4,152	$ 8,335

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).