Condensed Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net loss	$ (5,039)	$ (4,602)	$ (15,210)	$ (13,169)
Unrealized gain (loss) on available-for-sale securities	(1)	0	(3)	0
Net loss	$ (5,040)	$ (4,602)	$ (15,213)	$ (13,169)