CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 21,570	$ 7,232
Marketable securities, available-for-sale	0	4,497
Prepaid expenses and other current assets	5,736	6,240
Total current assets	27,306	17,969
Property and equipment, net	10	16
Operating lease right-of-use asset	114	159
Total assets	27,430	18,144
Current liabilities:
Accounts payable	566	2,245
Accrued liabilities	6,261	6,379
Lease liability, current portion	83	78
Deferred revenue	142	1,795
Note payable, current portion	194	0
Total current liabilities	7,246	10,497
Lease liability, net of current portion	31	73
Note payable, net of current portion	243	0
Total liabilities	7,520	10,570
Commitments and contingencies (Note 6)
Stockholders’ equity:
Common stock, $0.01 par value, 50,000,000 shares authorized at June 30, 2020 and December 31, 2019; 26,671,573 and 8,480,968 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	267	85
Additional paid-in capital	113,845	92,497
Accumulated other comprehensive gain	0	(28)
Accumulated deficit	(94,202)	(84,980)
Total stockholders’ equity	19,910	7,574
Total liabilities and stockholders’ equity	$ 27,430	$ 18,144