Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating expenses:
Research and development, net of grant reimbursement	$ 544	$ 574
General and administrative	778	877
Gain on sale of property and equipment	(100)
Total operating expenses	1,222	1,451
Operating loss	(1,222)	(1,451)
Interest income	72	92
Net loss	$ (1,150)	$ (1,359)
Net loss per share, basic and diluted	$ (0.05)	$ (0.08)
Shares used in computing net loss per share, basic and diluted	24,481	17,162