Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 19,241	$ 8,305
Marketable securities, available for-sale	36,510	82,575
Prepaid expenses and other current assets	2,287	1,266
Total current assets	58,038	92,146
Property and equipment-net	0	707
Other asset	0	26
Total assets	58,038	92,879
Current liabilities:
Accounts payable	4,711	12,908
Accrued liabilities	1,799	3,703
Total current liabilities	6,510	16,611
Total liabilities	6,510	16,611
Commitments and contingencies (Note 6)
Stockholders' equity:
Preferred stock, $0.01 par value; 10,000,000 shares authorized, no shares issued and outstanding as of June 30, 2022 and December 31, 2021	0	0
Common stock, $0.01 par value; 200,000,000 shares authorized, 40,254,890 shares issued and outstanding as of June 30, 2022 and December 31, 2021	403	403
Additional paid-in-capital	171,816	170,241
Accumulated other comprehensive income	(392)	(225)
Accumulated deficit	(120,299)	(94,151)
Total stockholders' equity	51,528	76,268
Total liabilities and stockholders' equity	$ 58,038	$ 92,879