Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 34,885	$ 44,365
Prepaid expenses and other current assets	964	963
Total current assets	35,849	45,328
Property and equipment, net	1,400	1,528
Intangible assets, net	1,719	1,886
Goodwill	2,791	2,791
Right-of-use assets	7,040	7,256
Other assets	365	365
Total assets	49,164	59,154
Current liabilities:
Accounts payable	1,712	1,836
Accrued expenses	2,268	3,814
Lease liability, current	1,101	1,058
Total current liabilities	5,081	6,708
Lease liability, less current portion	7,796	8,086
Total liabilities	12,877	14,794
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred stock, $0.001 par value; authorized – 50,000 shares; no shares issued and outstanding	0	0
Common stock, $0.001 par value; authorized – 500,000 shares; issued and outstanding – 55,225 shares and 55,144 shares at March 31, 2024 and December 31, 2023 respectively	55	55
Additional paid-in capital	383,284	381,220
Accumulated other comprehensive income (loss)	0	0
Accumulated deficit	(347,052)	(336,915)
Total stockholders’ equity	36,287	44,360
Total liabilities and stockholders’ equity	$ 49,164	$ 59,154