Statements of Changes in Stockholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning Balance, shares (in shares) at Dec. 31, 2021		227,093
Beginning Balance at Dec. 31, 2021	$ 5,818	$ 0	$ 27,722	$ (2)	$ (21,902)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	181		181
Unrealized loss on marketable securities, available-for-sale	(4)			(4)
Net loss	(2,635)				(2,635)
Ending Balance, shares (in shares) at Mar. 31, 2022		227,093
Ending Balance at Mar. 31, 2022	$ 3,360	$ 0	27,903	(6)	(24,537)
Beginning Balance, shares (in shares) at Dec. 31, 2022	449,408	449,408
Beginning Balance at Dec. 31, 2022	$ 2,342	$ 0	31,268	0	(28,926)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	85		85
Unrealized loss on marketable securities, available-for-sale	0
Net loss	$ (2,396)				(2,396)
Ending Balance, shares (in shares) at Mar. 31, 2023	449,408	449,408
Ending Balance at Mar. 31, 2023	$ 31	$ 0	$ 31,353	$ 0	$ (31,322)