Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 19,439	$ 14,203
Prepaid expenses and other current assets	389	480
Total current assets	19,828	14,683
Other assets	8	66
Total assets	19,836	14,749
Current liabilities:
Accounts payable, accrued expenses and other	589	562
Total current liabilities	589	562
Total liabilities	589	562
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.01 par value: 10,000 shares authorized at December 31, 2022 and 2021 no shares issued or outstanding at December 31, 2022 or 2021
Common stock, $0.01 par value: 30,000 shares authorized at December 31, 2022 and 2021; 14,215 and 13,410 shares issued and outstanding at December 31,2022 and 2021	1,342	1,334
Additional paid-in capital	565,541	558,945
Accumulated deficit	(547,636)	(546,092)
Total stockholders’ equity	19,247	14,187
Total liabilities and stockholders’ equity	$ 19,836	$ 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.

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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.