BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 53,359	$ 49,071
Other current assets	1,062	897
Total current assets	54,421	49,968
Right-of-use asset - operating	437	428
Property and equipment, net	48	21
Other assets	18	12
Total assets	54,924	50,429
Current liabilities:
Accounts payable	1,117	1,773
Accrued compensation and employee benefits	925	815
Accrued expenses and other liabilities	1,456	911
Total current liabilities	3,498	3,499
Operating lease liability, net of current portion	383	409
Total liabilities	3,881	3,908
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value; 5 million shares authorized; no shares issued or outstanding at December 31, 2021 and 2020
Common stock, $0.001 par value; 100 million shares authorized at December 31, 2021 and 2020; 14,410,143 and 9,548,150 shares issued and outstanding at December 31, 2021 and 2020, respectively	14	10
Additional paid-in capital	224,505	200,665
Accumulated deficit	(173,476)	(154,154)
Total stockholders’ equity	51,043	46,521
Total liabilities and stockholders’ equity	$ 54,924	$ 50,429

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

- Definition

Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.