Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 34,341	$ 37,942
Prepaid expenses and other current assets	659	132
Total current assets	35,000	38,074
Property and equipment, net	206	153
Operating lease right-of-use asset	998	705
Long-term prepaid rent	450	450
Security deposit	14	13
Total assets	36,668	39,395
Current liabilities:
Accounts payable	411	442
Accrued expenses	184	211
Accrued payroll related expenses	322	705
Current operating lease liability	213	90
Total current liabilities	1,130	1,448
Long term operating lease liability	849	602
Total liabilities	1,979	2,050
Commitments and contingencies (see Note 10)
Stockholders’ equity:
Preferred stock $0.001 par value, authorized 2,500 shares; none issued and outstanding at June 30, 2021 and December 31, 2020	0	0
Common stock: $0.001 par value, authorized 47,500 shares; 23,104 and 22,375 shares issued and outstanding as of June 30, 2021 and December 31, 2020, respectively;	23	22
Additional paid-in capital	192,152	187,463
Accumulated deficit	(157,486)	(150,140)
Total stockholders’ equity	34,689	37,345
Total liabilities and stockholders’ equity	$ 36,668	$ 39,395

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).