Condensed Statements Of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Issued [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balance at Dec. 31, 2019	$ 12,891	$ 339	$ 2,030	$ 10,522	$ 0
Beginning Balance, Shares at Dec. 31, 2019		3,395,521
Stock-based compensation expense	3		3
Net loss	(91)			(91)
Ending Balance at Mar. 31, 2020	12,803	$ 339	2,033	10,431	0
Ending Balance, Shares at Mar. 31, 2020		3,395,521
Beginning Balance at Dec. 31, 2020	12,774	$ 339	2,036	10,398	1
Beginning Balance, Shares at Dec. 31, 2020		3,395,521
Stock-based compensation expense	1		1
Net loss	(2)			(2)
Ending Balance at Mar. 31, 2021	$ 12,773	$ 339	$ 2,037	$ 10,396	$ 1
Ending Balance, Shares at Mar. 31, 2021		3,395,521