Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 13,355	$ 14,203
Prepaid expenses and other current assets	690	480
Total current assets	14,045	14,683
Other assets	10	66
Total assets	14,055	14,749
Current liabilities:
Accounts payable, accrued expenses and other	441	562
Total current liabilities	441	562
Total liabilities	441	562
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.01 par value: 10,000 shares authorized at June 30, 2022 and December 31, 2021; no shares issued or outstanding at June 30, 2022 or December 31, 2021
Common stock, $0.01 par value: 30,000 shares authorized at June 30, 2022 and December 31, 2021; 13,410 shares issued and outstanding at June 30, 2022 and December 31, 2021	1,334	1,334
Additional paid-in capital	558,982	558,945
Accumulated deficit	(546,702)	(546,092)
Total stockholders’ equity	13,614	14,187
Total liabilities and stockholders’ equity	$ 14,055	$ 14,749

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

Name:	us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
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.