CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 21,383	$ 30,115
Prepaid expenses and other current assets	2,668	3,415
Total current assets	24,051	33,530
Property and equipment, net	65	30
Operating lease right-of-use asset	72	74
Total assets	24,188	33,634
Current liabilities:
Accounts payable	1,338	568
Accrued liabilities	2,809	5,420
Lease liability, current portion	55	74
Note payable, current portion	0	291
Total current liabilities	4,202	6,353
Lease liability, net of current portion	18	0
Note payable, net of current portion	0	146
Total liabilities	4,220	6,499
Commitments and contingencies (Note 5)
Stockholders’ equity:
Common stock, $0.01 par value, 300,000,000 and 100,000,000 shares authorized as of September 30, 2021 and December 31, 2020, respectively; 88,732,346 and 53,551,461 shares issued and outstanding as of September 30, 2021 and December 31, 2020, respectively	887	536
Additional paid-in capital	158,381	132,492
Accumulated deficit	(139,300)	(105,893)
Total stockholders’ equity	19,968	27,135
Total liabilities and stockholders’ equity	$ 24,188	$ 33,634